diff --git a/README.md b/README.md
index 7397eabd..0c49c684 100755
--- a/README.md
+++ b/README.md
@@ -1066,10 +1066,10 @@ $api->miniTicker(function($api, $ticker) {
 
 #### Realtime Complete Chart Updates via WebSockets
 ```php
-$api->chart(["BNBBTC"], "15m", function($api, $symbol, $chart) {
+$api->chart(["BNBBTC"], function($api, $symbol, $chart) {
 	echo "{$symbol} chart update\n";
 	print_r($chart);
-});
+}, "15m");
 ```
 <details>
  <summary>View Response</summary>
diff --git a/composer.json b/composer.json
index 2486b834..2ef250c4 100755
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,7 @@
     },
     "autoload": {
         "classmap": [
+          "extensions/",
           "php-binance-api.php",
           "php-binance-api-rate-limiter.php"
         ]
diff --git a/examples/0.example.php b/examples/0.example.php
index bdcb4bc2..5c359b79 100755
--- a/examples/0.example.php
+++ b/examples/0.example.php
@@ -84,10 +84,10 @@
 
 
 // Get complete realtime chart data via WebSockets
-//$api->chart(["BNBBTC"], "15m", function($api, $symbol, $chart) {
+//$api->chart(["BNBBTC"], function($api, $symbol, $chart) {
 //    echo "{$symbol} chart update\n";
 //    print_r($chart);
-//});
+//}, "15m");
 
 
 // Grab realtime updated depth cache via WebSockets
diff --git a/examples/web_socket_chart.php b/examples/web_socket_chart.php
index 5b97f2a9..038c8a80 100755
--- a/examples/web_socket_chart.php
+++ b/examples/web_socket_chart.php
@@ -8,9 +8,9 @@
 $api = new Binance\API();
 
 // Get complete realtime chart data via WebSockets
-$api->chart(["BNBBTC"], "15m", function($api, $symbol, $chart) {
+$api->chart(["BNBBTC"], function($api, $symbol, $chart) {
     echo "{$symbol} chart update\n";
     print_r($chart);
     $endpoint = strtolower( $symbol ) . '@kline_' . "15m";
     $api->terminate( $endpoint );
-});
+}, "15m");
diff --git a/extensions/futures-api.php b/extensions/futures-api.php
new file mode 100644
index 00000000..28105e69
--- /dev/null
+++ b/extensions/futures-api.php
@@ -0,0 +1,1161 @@
+<?php
+namespace Binance;
+
+use Exception;
+
+trait Futures 
+{
+    /**
+     * 获取交易规则和交易对
+     *
+     * @return json containing the response
+     * @throws \Exception
+     */
+    public function futuresExchangeInfo()
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        $qstring = "fapi/v1/exchangeInfo";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+    
+    /**
+     * 深度信息
+     *
+     * @param $symbol string 交易对
+     * @param $limit int 默认 500; 可选值:[5, 10, 20, 50, 100, 500, 1000]
+     * @return json containing the response
+     * @throws \Exception
+     */
+    public function futuresDepth(string $symbol, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        $qstring = "fapi/v1/depth";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+    
+    /**
+     * 近期成交
+     *
+     * @param $symbol string 交易对
+     * @param $limit int 默认:500，最大1000
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresTrades(string $symbol, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        $qstring = "fapi/v1/trades";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 查询历史成交(MARKET_DATA)
+     *
+     * @param $symbol string 交易对
+     * @param $limit INT 默认值:500 最大值:1000.
+     * @param $fromId LONG 从哪一条成交id开始返回. 缺省返回最近的成交记录
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresHistoricalTrades(string $symbol, $limit = null, $fromId = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($fromId))
+            $opt['fromId'] = $fromId;
+
+        $qstring = "fapi/v1/historicalTrades";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 近期成交(归集)
+     *
+     * @param $symbol string 交易对
+     * @param $fromId LONG 从哪一条成交id开始返回. 缺省返回最近的成交记录
+     * @param $startTime LONG 从该时刻之后的成交记录开始返回结果
+     * @param $endTime LONG 返回该时刻为止的成交记录
+     * @param $limit INT 默认值:500 最大值:1000.
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresAggTrades(string $symbol, $fromId = null, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($fromId))
+            $opt['fromId'] = $fromId;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/aggTrades";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * K线数据
+     *
+     * @param $symbol string 交易对
+     * @param $interval ENUM 时间间隔
+     * @param $startTime LONG 从该时刻之后的成交记录开始返回结果
+     * @param $endTime LONG 返回该时刻为止的成交记录
+     * @param $limit INT 默认值:500 最大值:1000.
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresKlines(string $symbol, $interval, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "interval" => $interval,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/klines";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 连续合约K线数据
+     *
+     * @param $pair string 标的交易对
+     * @param $contractType ENUM 合约类型
+     * @param $interval ENUM 时间间隔
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @param $limit INT 默认值:500 最大值:1000.
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresContinuousKlines(string $symbol, $contractType, $interval, $startTime = null, $endTime = null, $limit = null)
+    {
+        // 合约类型:
+        // PERPETUAL 永续合约
+        // CURRENT_MONTH 当月交割合约
+        // NEXT_MONTH 次月交割合约
+        // CURRENT_QUARTER 当季交割合约
+        // NEXT_QUARTER 次季交割合约
+
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "contractType" => $contractType,
+            "interval" => $interval,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/continuousKlines";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 价格指数K线数据: 每根K线的开盘时间可视为唯一ID
+     *
+     * @param $pair string 标的交易对
+     * @param $interval ENUM 时间间隔
+     * @param $startTime LONG 从该时刻之后的成交记录开始返回结果
+     * @param $endTime LONG 返回该时刻为止的成交记录
+     * @param $limit INT 默认值:500 最大值:1000.
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresIndexPriceKlines(string $pair, $interval, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "pair" => $pair,
+            "interval" => $interval,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/indexPriceKlines";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 标记价格K线数据: 每根K线的开盘时间可视为唯一ID
+     *
+     * @param $symbol string 交易对
+     * @param $interval ENUM 时间间隔
+     * @param $startTime LONG 从该时刻之后的成交记录开始返回结果
+     * @param $endTime LONG 返回该时刻为止的成交记录
+     * @param $limit INT 默认值:500 最大值:1000.
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresMarkPriceKlines(string $symbol, $interval, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "interval" => $interval,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/markPriceKlines";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 最新标记价格和资金费率:采集各大交易所数据加权平均
+     *
+     * @param $symbol string 交易对
+     * @return array|json containing the response
+     * @throws \Exception
+     */
+    public function futuresPremiumIndex(string $symbol = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        $qstring = "fapi/v1/premiumIndex";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 查询资金费率历史
+     *
+     * @param $symbol string 交易对
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @param $limit INT 默认值:100 最大值:1000
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresFundingRate(string $symbol = null, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/fundingRate";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 24hr价格变动情况: 请注意，不携带symbol参数会返回全部交易对数据，不仅数据庞大，而且权重极高
+     *
+     * @param $symbol string 交易对
+     * @return array|json containing the response
+     * @throws \Exception
+     */
+    public function futuresTicker24hr(string $symbol = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        $qstring = "fapi/v1/ticker/24hr";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 最新价格
+     *
+     * @param $symbol string 交易对
+     * @return array|json containing the response
+     * @throws \Exception
+     */
+    public function futuresTickerPrice(string $symbol = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        $qstring = "fapi/v1/ticker/price";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 当前最优挂单
+     *
+     * @param $symbol string 交易对
+     * @return array|json containing the response
+     * @throws \Exception
+     */
+    public function futuresTickerBookTicker(string $symbol = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        $qstring = "fapi/v1/ticker/bookTicker";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 获取市场强平订单: 仅可查询最近7天数据
+     *
+     * @param $symbol string 交易对
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间,默认当前时间
+     * @param $limit INT 从endTime倒推算起的数据条数，默认值:100 最大值:1000
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresAllForceOrders(string $symbol = null, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/allForceOrders";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 获取未平仓合约数
+     *
+     * @param $symbol string 交易对
+     * @return array|json containing the response
+     * @throws \Exception
+     */
+    public function futuresOpenInterest(string $symbol)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        $qstring = "fapi/v1/openInterest";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 合约持仓量
+     *
+     * @param $symbol string 交易对
+     * @param $period ENUM "5m","15m","30m","1h","2h","4h","6h","12h","1d"
+     * @param $limit INT default 30, max 500
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresDataOpenInterestHist(string $symbol, $period, $limit = null, $startTime = null, $endTime = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "period" => $period,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "futures/data/openInterestHist";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 大户账户数多空比
+     *
+     * @param $symbol string 交易对
+     * @param $period ENUM "5m","15m","30m","1h","2h","4h","6h","12h","1d"
+     * @param $limit INT default 30, max 500
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresDataTopLongShortAccountRatio(string $symbol, $period, $limit = null, $startTime = null, $endTime = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "period" => $period,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "futures/data/topLongShortAccountRatio";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 大户持仓量多空比
+     *
+     * @param $symbol string 交易对
+     * @param $period ENUM "5m","15m","30m","1h","2h","4h","6h","12h","1d"
+     * @param $limit INT default 30, max 500
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresDataTopLongShortPositionRatio(string $symbol, $period, $limit = null, $startTime = null, $endTime = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "period" => $period,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "futures/data/topLongShortPositionRatio";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 多空持仓人数比
+     *
+     * @param $symbol string 交易对
+     * @param $period ENUM "5m","15m","30m","1h","2h","4h","6h","12h","1d"
+     * @param $limit INT default 30, max 500
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresDataGlobalLongShortAccountRatio(string $symbol, $period, $limit = null, $startTime = null, $endTime = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "period" => $period,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "futures/data/globalLongShortAccountRatio";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 合约主动买卖量
+     *
+     * @param $symbol string 交易对
+     * @param $period ENUM "5m","15m","30m","1h","2h","4h","6h","12h","1d"
+     * @param $limit INT default 30, max 500
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresDataTakerlongshortRatio(string $symbol, $period, $limit = null, $startTime = null, $endTime = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "period" => $period,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "futures/data/takerlongshortRatio";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 杠杆代币历史净值K线
+     *
+     * @param $symbol string 交易对
+     * @param $interval ENUM 
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @param $limit INT 默认 500, 最大 1000
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresLvtKlines(string $symbol, $interval, $limit = null, $startTime = null, $endTime = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "interval" => $interval,
+        ];
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        $qstring = "fapi/v1/lvtKlines";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 综合指数交易对信息
+     *
+     * @param $symbol string 交易对
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresIndexInfo(string $symbol = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        $qstring = "fapi/v1/indexInfo";
+        return $this->httpRequest($qstring, "GET", $opt, false);
+    }
+
+    /**
+     * 更改持仓模式(TRADE)
+     *
+     * @param $dualSidePosition string "true": 双向持仓模式；"false": 单向持仓模式
+     * @return json containing the response
+     * @throws \Exception
+     */
+    public function futuresPositionSideDual(string $dualSidePosition = 'false')
+    {
+        $opt = [
+            "fapi" => true,
+            "dualSidePosition" => $dualSidePosition,
+        ];
+
+        $qstring = "fapi/v1/positionSide/dual";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 查询持仓模式(USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresGetPositionSideDual()
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        $qstring = "fapi/v1/positionSide/dual";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 下单 (TRADE)
+     *
+     * @param $symbol STRING 交易对
+     * @param $side ENUM 买卖方向 SELL, BUY
+     * @param $positionSide ENUM 持仓方向，单向持仓模式下非必填，默认且仅可填BOTH;在双向持仓模式下必填,且仅可选择 LONG 或 SHORT
+     * @param $type ENUM 订单类型 LIMIT, MARKET, STOP, TAKE_PROFIT, STOP_MARKET, TAKE_PROFIT_MARKET, TRAILING_STOP_MARKET
+     * @param $reduceOnly STRING true, false; 非双开模式下默认false；双开模式下不接受此参数； 使用closePosition不支持此参数。
+     * @param $quantity DECIMAL 下单数量,使用closePosition不支持此参数。
+     * @param $price DECIMAL 委托价格
+     * @param $newClientOrderId STRING 用户自定义的订单号，不可以重复出现在挂单中。如空缺系统会自动赋值。必须满足正则规则 ^[\.A-Z\:/a-z0-9_-]{1,36}$
+     * @param $stopPrice DECIMAL 触发价, 仅 STOP, STOP_MARKET, TAKE_PROFIT, TAKE_PROFIT_MARKET 需要此参数
+     * @param $closePosition STRING	 true, false；触发后全部平仓，仅支持STOP_MARKET和TAKE_PROFIT_MARKET；不与quantity合用；自带只平仓效果，不与reduceOnly 合用
+     * @param $activationPrice DECIMAL 追踪止损激活价格，仅TRAILING_STOP_MARKET 需要此参数, 默认为下单当前市场价格(支持不同workingType)
+     * @param $callbackRate DECIMAL 追踪止损回调比例，可取值范围[0.1, 5],其中 1代表1% ,仅TRAILING_STOP_MARKET 需要此参数
+     * @param $timeInForce ENUM 有效方法
+     * @param $workingType ENUM stopPrice 触发类型: MARK_PRICE(标记价格), CONTRACT_PRICE(合约最新价). 默认 CONTRACT_PRICE
+     * @param $priceProtect STRING 条件单触发保护："TRUE","FALSE", 默认"FALSE". 仅 STOP, STOP_MARKET, TAKE_PROFIT, TAKE_PROFIT_MARKET 需要此参数
+     * @param $newOrderRespType ENUM "ACK", "RESULT", 默认 "ACK"
+     * @param $test boolean 是否測試購買?
+     * @return json containing the response
+     * @throws \Exception
+     */
+    public function futuresOrder(string $symbol, string $side, string $type, $positionSide = null, $reduceOnly = null, $quantity = null, $price = null, $newClientOrderId = null, $stopPrice = null, $closePosition = null, $activationPrice = null, $callbackRate = null, $timeInForce = null, $workingType = null, $priceProtect = null, $newOrderRespType = "RESULT", bool $test = false)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "side" => $side,
+            "type" => $type,
+        ];
+
+        if(!is_null($newOrderRespType))
+            $opt['newOrderRespType'] = $newOrderRespType;
+
+        if(!is_null($closePosition) and $closePosition != 'false') {
+            if(is_null($stopPrice))
+                throw new Exception('當 closePosition 為 true 強制要求參數：stopPrice');
+            $opt['stopPrice'] = $stopPrice;
+            $opt['closePosition'] = $closePosition;
+        }
+        else {
+            // 驗證必要參數
+            switch($type) 
+            {
+                case 'LIMIT':
+                    if(is_null($timeInForce) or is_null($quantity) or is_null($price))
+                        throw new Exception('根據 order type的不同，強制要求參數：timeInForce, quantity, price');
+                    $opt['timeInForce'] = $timeInForce;
+                    $opt['quantity'] = $quantity;
+                    $opt['price'] = $price;
+                    break;
+                case 'MARKET':
+                    if(is_null($quantity))
+                        throw new Exception('根據 order type的不同，強制要求參數：quantity');
+                    $opt['quantity'] = $quantity;
+                    break;
+                case 'STOP':
+                case 'TAKE_PROFIT':
+                    if(is_null($quantity) or is_null($price) or is_null($stopPrice))
+                        throw new Exception('根據 order type的不同，強制要求參數：quantity, price, stopPrice');
+                    $opt['quantity'] = $quantity;
+                    $opt['price'] = $price;
+                    $opt['stopPrice'] = $stopPrice;
+                    break;
+                case 'STOP_MARKET':
+                case 'TAKE_PROFIT_MARKET':
+                    if(is_null($stopPrice))
+                        throw new Exception('根據 order type的不同，強制要求參數：stopPrice');
+                    $opt['stopPrice'] = $stopPrice;
+                    break;
+                case 'TRAILING_STOP_MARKET':
+                    if(is_null($callbackRate))
+                        throw new Exception('根據 order type的不同，強制要求參數：callbackRate');
+                    $opt['callbackRate'] = $callbackRate;
+                    break;
+            }
+        }
+
+        if(!is_null($positionSide))
+            $opt['positionSide'] = $positionSide;
+
+        if(!is_null($reduceOnly))
+            $opt['reduceOnly'] = $reduceOnly;
+
+        if(!is_null($newClientOrderId))
+            $opt['newClientOrderId'] = $newClientOrderId;
+
+        if(!is_null($activationPrice))
+            $opt['activationPrice'] = $activationPrice;
+
+        if(!is_null($workingType))
+            $opt['workingType'] = $workingType;
+
+        if(!is_null($priceProtect))
+            $opt['priceProtect'] = $priceProtect;
+
+        if(!is_null($newOrderRespType))
+            $opt['newOrderRespType'] = $newOrderRespType;
+
+        $qstring = ($test) ? "fapi/v1/order/test" : "fapi/v1/order";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 触发后全部平仓，
+     *
+     * @param $symbol STRING 交易对
+     * @param $side ENUM 买卖方向 SELL, BUY
+     * @param $type ENUM 订单类型 LIMIT, MARKET, STOP, TAKE_PROFIT, STOP_MARKET, TAKE_PROFIT_MARKET, TRAILING_STOP_MARKET
+     * @param $stop_price int 限價
+     * @throws \Exception
+     */
+    public function featuresClosePositionOrder(string $symbol, string $side, string $type = 'STOP_MARKET', $stop_price = null, bool $test = false)
+    {
+        return $this->futuresOrder($symbol, $side, $type, null, null, null, null, null, $stop_price, 'true', null, null, null, null, null, "RESULT", $test);
+    }
+
+    /**
+     * 查询订单 (USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @param $orderId LONG 系统订单号
+     * @param $origClientOrderId string 用户自定义的订单号
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresGetOrder(string $symbol, $orderId = null, $origClientOrderId = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+        
+        if(!is_null($orderId))
+            $opt['orderId'] = $orderId;
+
+        if(!is_null($origClientOrderId))
+            $opt['origClientOrderId'] = $origClientOrderId;
+
+        $qstring = "fapi/v1/order";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 查询订单 (USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @param $orderId LONG 只返回此orderID及之后的订单，缺省返回最近的订单
+     * @param $startTime string 起始时间
+     * @param $endTime string 结束时间
+     * @param $limit int 返回的结果集数量 默认值:500 最大值:1000
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresAllOrders(string $symbol, $orderId = null, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+        
+        if(!is_null($orderId))
+            $opt['orderId'] = $orderId;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        $qstring = "fapi/v1/allOrders";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 查询订单 (USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @param $orderId LONG 系统订单号
+     * @param $origClientOrderId string 用户自定义的订单号
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresDeleteOrder(string $symbol, $orderId = null, $origClientOrderId = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+        
+        if(!is_null($orderId))
+            $opt['orderId'] = $orderId;
+
+        if(!is_null($origClientOrderId))
+            $opt['origClientOrderId'] = $origClientOrderId;
+
+        $qstring = "fapi/v1/order";
+        return $this->httpRequest($qstring, "DELETE", $opt, true);
+    }
+
+    /**
+     * 撤销全部订单 (TRADE)
+     *
+     * @param $symbol string 交易对
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresDeleteAllOpenOrders(string $symbol)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+        
+        $qstring = "fapi/v1/allOpenOrders";
+        return $this->httpRequest($qstring, "DELETE", $opt, true);
+    }
+
+    /**
+     * 倒计时撤销所有订单 (TRADE)
+     *
+     * @param $symbol string 交易对
+     * @param $countdownTime LONG 倒计时。 1000 表示 1 秒； 0 表示取消倒计时撤单功能。
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresCountdownCancelAll(string $symbol, $countdownTime = 1000)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "countdownTime" => $countdownTime,
+        ];
+        
+        $qstring = "fapi/v1/countdownCancelAll";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 查询当前挂单 (USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @param $orderId LONG 系统订单号
+     * @param $origClientOrderId string 用户自定义的订单号
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresOpenOrder(string $symbol, $orderId = null, $origClientOrderId = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+        
+        if(!is_null($orderId))
+            $opt['orderId'] = $orderId;
+
+        if(!is_null($origClientOrderId))
+            $opt['origClientOrderId'] = $origClientOrderId;
+        
+        $qstring = "fapi/v1/openOrder";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 查看当前全部挂单 (USER_DATA)
+     *
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresOpenOrders(string $symbol = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+        
+        $qstring = "fapi/v1/openOrders";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 账户信息V2 by key
+     *
+     * @param $symbols string 最多可以传5个symbol; 由","分隔的字符串表示. e.g. "BTCUSDT,BNBUSDT,ADAUSDT"
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresAccountByKey()
+    {
+        $account = $this->futuresAccount();
+        if(array_key_exists('assets', $account)) {;
+            $tmp = [];
+            // 只記錄在 SymbolType 裡存在的資訊
+            foreach($account['assets'] as $key => $value){
+                $tmp[$value['asset']] = $value;
+            }
+            $account['assets'] = $tmp;
+        }
+        if(array_key_exists('positions', $account)) {;
+            $tmp = [];
+            // 只記錄在 SymbolType 裡存在的資訊
+            foreach($account['positions'] as $key => $value){
+                $tmp[$value['symbol']] = $value;
+            }
+            $account['positions'] = $tmp;
+        }
+        return $account;
+    }
+
+    /**
+     * 账户信息V2 (USER_DATA)
+     *
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresAccount()
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        $qstring = "fapi/v2/account";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 调整开仓杠杆 (TRADE)
+     *
+     * @param $symbol string 交易对
+     * @param $leverage int 目标杠杆倍数：1 到 125 整数
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresLeverage(string $symbol, $leverage = 5)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "leverage" => $leverage,
+        ];
+        
+        $qstring = "fapi/v1/leverage";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 变换逐仓模式 (TRADE)
+     *
+     * @param $symbol string 交易对
+     * @param $marginType ENUM 保证金模式 ISOLATED(逐仓), CROSSED(全仓)
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresIsolatedMarginType(string $symbol)
+    {
+        return $this->futuresMarginType($symbol, 'ISOLATED');
+    }
+
+    /**
+     * 变换逐全仓模式 (TRADE)
+     *
+     * @param $symbol string 交易对
+     * @param $marginType ENUM 保证金模式 ISOLATED(逐仓), CROSSED(全仓)
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresMarginType(string $symbol, $marginType = 'CROSSED')
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "marginType" => $marginType,
+        ];
+        
+        $qstring = "fapi/v1/marginType";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 调整逐仓保证金 (TRADE)
+     *
+     * @param $symbol string 交易对
+     * @param $positionSide ENUM 持仓方向，单向持仓模式下非必填，默认且仅可填BOTH;在双向持仓模式下必填,且仅可选择 LONG 或 SHORT
+     * @param $amount DECIMAL 保证金资金
+     * @param $type int 调整方向 1: 增加逐仓保证金，2: 减少逐仓保证金
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresPositionMargin(string $symbol, $amount, $type = 1, $positionSide = null)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+            "amount" => $amount,
+            "type" => $type,
+        ];
+
+        if(!is_null($positionSide))
+            $opt['positionSide'] = $positionSide;
+        
+        $qstring = "fapi/v1/positionMargin";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 用户持仓风险V2 (USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresPositionRisk(string $symbol)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        $qstring = "fapi/v2/positionRisk";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 获取账户损益资金流水(USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @param $incomeType STRING 收益类型 "TRANSFER"，"WELCOME_BONUS", "REALIZED_PNL"，"FUNDING_FEE", "COMMISSION", and "INSURANCE_CLEAR"
+     * @param $startTime LONG 起始时间
+     * @param $endTime LONG 结束时间
+     * @param $limit INT 返回的结果集数量 默认值:100 最大值:1000
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresIncome(string $symbol = null, $incomeType = null, $startTime = null, $endTime = null, $limit = null)
+    {
+        $opt = [
+            "fapi" => true,
+        ];
+
+        if(!is_null($symbol))
+            $opt['symbol'] = $symbol;
+
+        if(!is_null($incomeType))
+            $opt['incomeType'] = $incomeType;
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        $qstring = "fapi/v1/income";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 用户手续费率 (USER_DATA)
+     *
+     * @param $symbol string 交易对
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function futuresCommissionRate(string $symbol)
+    {
+        $opt = [
+            "fapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        $qstring = "fapi/v1/commissionRate";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+        // return: {
+        //     "symbol": "BTCUSDT",
+        //     "makerCommissionRate": "0.0002",  // 0.02%
+        //     "takerCommissionRate": "0.0004"   // 0.04%
+        // }
+    }
+}
\ No newline at end of file
diff --git a/extensions/margin-api.php b/extensions/margin-api.php
new file mode 100644
index 00000000..76e6536e
--- /dev/null
+++ b/extensions/margin-api.php
@@ -0,0 +1,628 @@
+<?php
+namespace Binance;
+
+trait Margin 
+{    
+    /**
+     * 查詢槓桿借貸階梯
+     *
+     * @param  mixed $symbol
+     * @return void
+     */
+    public function marginIsolatedLadder(string $symbol)
+    {
+        $opt = [
+            "bapi" => true,
+        ];
+
+        $qstring = "margin/v1/friendly/isolated-margin/ladder/{$symbol}";
+        return $this->httpRequest($qstring, "GET", $opt);
+    }
+
+    /**
+     * 杠杆账户逐倉下单 (TRADE)
+     *
+     * @param $symbol string BTC
+     * @param $side ENUM 订单方向 : BUY / SELL
+     * @param $type ENUM 订单类型 (orderTypes, type)
+     * @param $quantity DECIMAL 
+     * @param $quoteOrderQty DECIMAL 
+     * @param $price DECIMAL 
+     * @param $stopPrice DECIMAL 与STOP_LOSS, STOP_LOSS_LIMIT, TAKE_PROFIT, 和 TAKE_PROFIT_LIMIT 订单一起使用.
+     * @param $newClientOrderId string 客户自定义的唯一订单ID。若未发送自动生成。 
+     * @param $icebergQty DECIMAL 与 LIMIT, STOP_LOSS_LIMIT, 和 TAKE_PROFIT_LIMIT 一起使用创建 iceberg 订单.
+     * @param $newOrderRespType ENUM 设置响应: JSON. ACK, RESULT, 或 FULL; MARKET 和 LIMIT 订单类型默认为 FULL, 所有其他订单默认为 ACK.
+     * @param $sideEffectType ENUM NO_SIDE_EFFECT, MARGIN_BUY, AUTO_REPAY;默认为 NO_SIDE_EFFECT.
+     * @param $timeInForce ENUM GTC,IOC,FOK
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedOrder(string $symbol, string $side = "BUY", string $type = "LIMIT", $quantity = null, $quoteOrderQty = null, $price = null, $stopPrice = null, $newClientOrderId = null, $icebergQty = null, $newOrderRespType = null, $sideEffectType = "NO_SIDE_EFFECT", $timeInForce = "GTC")
+    {
+        return $this->marginOrder($symbol, $side, $type, "TRUE", $quantity, $quoteOrderQty, $price, $stopPrice, $newClientOrderId, $icebergQty, $newOrderRespType, $sideEffectType, $timeInForce);
+    }
+
+    /**
+     * 杠杆账户下单 (TRADE)
+     *
+     * @param $symbol string BTC
+     * @param $side ENUM 订单方向 : BUY / SELL
+     * @param $type ENUM 订单类型 (orderTypes, type)
+     * @param $isIsolated bool 是否為逐倉交易
+     * @param $quantity DECIMAL 
+     * @param $quoteOrderQty DECIMAL 
+     * @param $price DECIMAL 
+     * @param $stopPrice DECIMAL 与STOP_LOSS, STOP_LOSS_LIMIT, TAKE_PROFIT, 和 TAKE_PROFIT_LIMIT 订单一起使用.
+     * @param $newClientOrderId string 客户自定义的唯一订单ID。若未发送自动生成。 
+     * @param $icebergQty DECIMAL 与 LIMIT, STOP_LOSS_LIMIT, 和 TAKE_PROFIT_LIMIT 一起使用创建 iceberg 订单.
+     * @param $newOrderRespType ENUM 设置响应: JSON. ACK, RESULT, 或 FULL; MARKET 和 LIMIT 订单类型默认为 FULL, 所有其他订单默认为 ACK.
+     * @param $sideEffectType ENUM NO_SIDE_EFFECT, MARGIN_BUY, AUTO_REPAY;默认为 NO_SIDE_EFFECT.
+     * @param $timeInForce ENUM GTC,IOC,FOK
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginOrder(string $symbol, string $side = "BUY", string $type = "LIMIT", $isIsolated = "FALSE", $quantity = null, $quoteOrderQty = null, $price = null, $stopPrice = null, $newClientOrderId = null, $icebergQty = null, $newOrderRespType = null, $sideEffectType = "NO_SIDE_EFFECT", $timeInForce = "GTC")
+    {
+        // 类型 | 强制要求的参数
+        // LIMIT | timeInForce, quantity, price
+        // MARKET | quantity or quoteOrderQty
+        // STOP_LOSS | quantity, stopPrice
+        // STOP_LOSS_LIMIT | timeInForce, quantity, price, stopPrice
+        // TAKE_PROFIT | quantity, stopPrice
+        // TAKE_PROFIT_LIMIT | timeInForce, quantity, price, stopPrice
+        // LIMIT_MAKER | quantity, price
+
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+            "side" => $side,
+            "type" => $type,
+            "isIsolated" => $isIsolated,
+            "sideEffectType" => $sideEffectType
+        ];
+
+        switch($type) {
+            case "LIMIT":
+                $opt['newOrderRespType'] = 'FULL';
+                $opt = array_merge($opt, compact('timeInForce', 'quantity', 'price'));
+                break;
+            case "MARKET":
+                $opt['newOrderRespType'] = 'FULL';
+                if(!is_null($quoteOrderQty))
+                    $opt['quoteOrderQty'] = $quoteOrderQty;
+                else
+                    $opt['quantity'] = $quantity;
+                break;
+            case "STOP_LOSS":
+                $opt['newOrderRespType'] = 'ACK';
+                $opt = array_merge($opt, compact('quantity', 'stopPrice'));
+                break;
+            case "STOP_LOSS_LIMIT":
+                $opt['newOrderRespType'] = 'ACK';
+                $opt = array_merge($opt, compact('timeInForce', 'quantity', 'price', 'stopPrice'));
+                break;
+            case "TAKE_PROFIT":
+                $opt['newOrderRespType'] = 'ACK';
+                $opt = array_merge($opt, compact('quantity', 'stopPrice'));
+                break;
+            case "TAKE_PROFIT_LIMIT":
+                $opt['newOrderRespType'] = 'ACK';
+                $opt = array_merge($opt, compact('timeInForce', 'quantity', 'price', 'stopPrice'));
+                break;
+            case "LIMIT_MAKER":
+                $opt['newOrderRespType'] = 'ACK';
+                $opt = array_merge($opt, compact('quantity', 'price'));
+                break;
+        }
+
+        if(!is_null($newOrderRespType))
+            $opt['newOrderRespType'] = $newOrderRespType;
+
+        $qstring = "v1/margin/order";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 逐倉杠杆账户撤销订单 (TRADE)
+     *
+     * @param $symbol string BTC
+     * @param $orderId LONG
+     * @param $origClientOrderId string
+     * @param $newClientOrderId string
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginDeleteIsolatedOrder(string $symbol, $orderId = null, string $origClientOrderId = null, string $newClientOrderId = null)
+    {
+        return $this->marginDeleteOrder($symbol, "TRUE", $orderId, $origClientOrderId, $newClientOrderId);
+    }
+
+    /**
+     * 杠杆账户撤销订单 (TRADE)
+     *
+     * @param $symbol string BTC
+     * @param $isIsolated bool 是否為逐倉交易
+     * @param $orderId LONG 
+     * @param $origClientOrderId string
+     * @param $newClientOrderId string
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginDeleteOrder(string $symbol, $isIsolated = "FALSE", $orderId = null, string $origClientOrderId = null, string $newClientOrderId = null)
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+            "isIsolated" => $isIsolated,
+        ];
+
+        if(!is_null($origClientOrderId))
+            $opt['origClientOrderId'] = $origClientOrderId;
+        else
+            $opt['orderId'] = $orderId;
+
+        $qstring = "v1/margin/order";
+        return $this->httpRequest($qstring, "DELETE", $opt, true);
+    }
+
+    /**
+     * 查询杠杆价格指数
+     *
+     * @param $symbol string BTC
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginPriceIndex(string $symbol)
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        $qstring = "v1/margin/priceIndex";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 查询杠杆价格指数
+     *
+     * @param $symbol string BTC
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginPrice(string $symbol)
+    {
+        $ticker = $this->marginPriceIndex($symbol);
+        return $ticker['price'];
+    }
+
+    /**
+     * 查询逐倉杠杆账户交易历史
+     *
+     * @param $symbol string BTCUSDT
+     * @param $startTime LONG 
+     * @param $endTime LONG 
+     * @param $fromId LONG 
+     * @param $limit int
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginGetIsolatedMyTrades(string $symbol, $startTime = null, $endTime = null, $fromId = null, $limit = 500)
+    {
+        return $this->marginGetMyTrades($symbol, "TRUE", $startTime, $endTime, $fromId, $limit);
+    }
+
+    /**
+     * 查询杠杆账户交易历史
+     *
+     * @param $symbol string BTCUSDT
+     * @param $isIsolated bool 是否為逐倉交易
+     * @param $startTime LONG 
+     * @param $endTime LONG 
+     * @param $fromId LONG 
+     * @param $limit int
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginGetMyTrades(string $symbol, $isIsolated = "FALSE", $startTime = null, $endTime = null, $fromId = null, $limit = 500)
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+            "isIsolated" => $isIsolated,
+        ];
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        if(!is_null($fromId))
+            $opt['fromId'] = $fromId;
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        $qstring = "v1/margin/myTrades";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 查询逐倉杠杆账户的所有订单
+     *
+     * @param $symbol string BTCUSDT
+     * @param $orderId LONG 
+     * @param $startTime LONG 
+     * @param $endTime LONG
+     * @param $limit int
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginGetIsolatedAllOrders(string $symbol, $orderId = null, $startTime = null, $endTime = null, $limit = 500)
+    {
+        return $this->marginGetAllOrders($symbol, "TRUE", $orderId, $startTime, $endTime, $limit);
+    }
+
+    /**
+     * 查询杠杆账户的所有订单
+     *
+     * @param $symbol string BTCUSDT
+     * @param $isIsolated bool 是否為逐倉交易
+     * @param $orderId LONG 
+     * @param $startTime LONG 
+     * @param $endTime LONG
+     * @param $limit int
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginGetAllOrders(string $symbol, $isIsolated = "FALSE", $orderId = null, $startTime = null, $endTime = null, $limit = 500)
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+            "isIsolated" => $isIsolated,
+        ];
+
+        if(!is_null($startTime))
+            $opt['startTime'] = $startTime;
+
+        if(!is_null($endTime))
+            $opt['endTime'] = $endTime;
+
+        if(!is_null($orderId))
+            $opt['orderId'] = $orderId;
+
+        if(!is_null($limit))
+            $opt['limit'] = $limit;
+
+        $qstring = "v1/margin/allOrders";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 逐倉杠杆账户归还借贷
+     *
+     * @param $asset string 
+     * @param $amount int 
+     * @param $symbol string BTCUSDT
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedRepay($asset, $amount, string $symbol)
+    {
+        return $this->marginRepay($asset, $amount, "TRUE", $symbol);
+    }
+
+    /**
+     * 杠杆账户归还借贷
+     *
+     * @param $asset string 
+     * @param $amount int 
+     * @param $symbol string BTCUSDT
+     * @param $isIsolated bool 是否為逐倉交易
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginRepay($asset, $amount, $isIsolated = "FALSE", string $symbol = null)
+    {
+        $opt = [
+            "sapi" => true,
+            "asset" => $asset,
+            "amount" => $amount,
+            "isIsolated" => $isIsolated,
+        ];
+
+        if($isIsolated != "FALSE")
+            $opt['symbol'] = $symbol;
+
+        $qstring = "v1/margin/repay";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 查询杠杆账户订单 (USER_DATA) 一些历史订单的 cummulativeQuoteQty < 0, 是指当前数据不存在。
+     *
+     * @param $symbol string BTC
+     * @param $orderId LONG 
+     * @param $origClientOrderId string
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginGetIsolatedOrder(string $symbol, $orderId = null, string $origClientOrderId = null)
+    {
+        return $this->marginGetOrder($symbol, "TRUE", $orderId, $origClientOrderId);
+    }
+
+    /**
+     * 查询杠杆账户订单 (USER_DATA) 一些历史订单的 cummulativeQuoteQty < 0, 是指当前数据不存在。
+     *
+     * @param $symbol string BTC
+     * @param $isIsolated bool 是否為逐倉交易
+     * @param $orderId LONG 
+     * @param $origClientOrderId string
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginGetOrder(string $symbol, $isIsolated = "FALSE", $orderId = null, string $origClientOrderId = null)
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+            "isIsolated" => $isIsolated,
+        ];
+
+        if(!is_null($origClientOrderId))
+            $opt['origClientOrderId'] = $origClientOrderId;
+        else
+            $opt['orderId'] = $orderId;
+
+        $qstring = "v1/margin/order";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 杠杆账户撤销单一交易对的所有逐倉挂单 (TRADE)
+     *
+     * @param $symbol string BTC
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginDeleteIsolatedOpenOrders(string $symbol)
+    {
+        return $this->marginDeleteOpenOrders($symbol, "TRUE");
+    }
+
+    /**
+     * 杠杆账户撤销单一交易对的所有挂单 (TRADE)
+     *
+     * @param $symbol string BTC
+     * @param $isIsolated bool 是否為逐倉交易
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginDeleteOpenOrders(string $symbol, $isIsolated = "FALSE")
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+            "isIsolated" => $isIsolated,
+        ];
+
+        $qstring = "v1/margin/openOrders";
+        return $this->httpRequest($qstring, "DELETE", $opt, true);
+    }
+
+    /**
+     * 查询逐倉杠杆账户挂单记录 (USER_DATA)
+     *
+     * @param $symbol string BTC
+     * @param $isIsolated bool 是否為逐倉交易
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedOpenOrders(string $symbol)
+    {
+        return $this->marginOpenOrders($symbol, "TRUE");
+    }
+
+    /**
+     * 查询杠杆账户挂单记录 (USER_DATA)
+     *
+     * @param $symbol string BTC
+     * @param $isIsolated bool 是否為逐倉交易
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginOpenOrders(string $symbol, $isIsolated = "FALSE")
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+            "isIsolated" => $isIsolated,
+        ];
+
+        $qstring = "v1/margin/openOrders";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 查询杠杆逐仓账户信息
+     *
+     * @param $symbols string 最多可以传5个symbol; 由","分隔的字符串表示. e.g. "BTCUSDT,BNBUSDT,ADAUSDT"
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedAccount(string $symbols = null)
+    {
+        $opt = [
+            "sapi" => true,
+        ];
+
+        if(!empty($symbols))
+            $opt['symbols'] = $symbols;
+
+        $qstring = "v1/margin/isolated/account";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 查询杠杆逐仓账户信息 by key
+     *
+     * @param $symbols string 最多可以传5个symbol; 由","分隔的字符串表示. e.g. "BTCUSDT,BNBUSDT,ADAUSDT"
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedAccountByKey(string $symbols = null)
+    {
+        $account = $this->marginIsolatedAccount($symbols);
+        if(array_key_exists('assets', $account)) {;
+            $tmp = [];
+            // 只記錄在 SymbolType 裡存在的資訊
+            foreach($account['assets'] as $key => $value){
+                $tmp[$value['symbol']] = $value;
+            }
+            $account['assets'] = $tmp;
+        }
+        return $account;
+    }
+
+    /**
+     * 杠杆逐仓账户划转 (MARGIN)
+     *
+     * @param $asset string 被划转的资产, 比如, BTC
+     * @param $symbol string 逐仓 symbol
+     * @param $transFrom string "SPOT", "ISOLATED_MARGIN"
+     * @param $transTo string "SPOT", "ISOLATED_MARGIN"
+     * @param $amount DECIMAL 划转数量
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedTransfer(string $asset, string $symbol, string $transFrom, string $transTo, $amount)
+    {
+        $opt = [
+            "sapi" => true,
+            "asset" => $asset,
+            "symbol" => $symbol,
+            "transFrom" => $transFrom,
+            "transTo" => $transTo,
+            "amount" => $amount,
+        ];
+
+        // someone has preformated there 8 decimal point double already
+        // dont do anything, leave them do whatever they want
+        if (gettype($amount) !== "string") {
+            // for every other type, lets format it appropriately
+            $amount = number_format($amount, 8, '.', '');
+        }
+
+        if (is_numeric($amount) === false) {
+            // WPCS: XSS OK.
+            echo "warning: amount expected numeric got " . gettype($amount) . PHP_EOL;
+        }
+
+        $qstring = "v1/margin/isolated/transfer";
+        return $this->httpRequest($qstring, "POST", $opt, true);
+    }
+
+    /**
+     * 查询杠杆资产 (MARKET_DATA)
+     *
+     * @param $asset string 被划转的资产, 比如, BTC
+     * @return json containing the response
+     * @throws \Exception
+     */
+    public function marginAsset(string $asset)
+    {
+        $opt = [
+            "sapi" => true,
+            "asset" => $asset,
+        ];
+
+        $qstring = "v1/margin/asset";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 获取所有杠杆资产信息 (MARKET_DATA)
+     *
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginAllAsset()
+    {
+        $opt = [
+            "sapi" => true,
+        ];
+
+        $qstring = "v1/margin/allAssets";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 获取杠杆利率历史 (USER_DATA)
+     *
+     * @param $asset string 被划转的资产, 比如, BTC
+     * @param $vipLevel string 默认用户当前等级
+     * @param $startTime LONG 默认7天前
+     * @param $endTime LONG 默认当天，时间间隔最大为3个月
+     * @param $limit int 默认20，最大100
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginInterestRateHistory(string $asset, string $vipLevel = null, $startTime = 0, $endTime = 0, $limit = 20)
+    {
+        $opt = [
+            "sapi" => true,
+            "asset" => $asset,
+        ];
+
+        if($vipLevel)
+            $opt['vipLevel'] = $vipLevel;
+
+        if($startTime)
+            $opt['startTime'] = $startTime;
+
+        if($endTime)
+            $opt['endTime'] = $endTime;
+
+        if($limit)
+            $opt['limit'] = $limit;
+
+        $qstring = "v1/margin/interestRateHistory";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 获取所有逐仓杠杆交易对
+     *
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedAllPairs()
+    {
+        $opt = [
+            "sapi" => true,
+        ];
+
+        $qstring = "v1/margin/isolated/allPairs";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+
+    /**
+     * 获取所有逐仓杠杆交易对
+     *
+     * @return array containing the response
+     * @throws \Exception
+     */
+    public function marginIsolatedPairs($symbol)
+    {
+        $opt = [
+            "sapi" => true,
+            "symbol" => $symbol,
+        ];
+
+        $qstring = "v1/margin/isolated/pair";
+        return $this->httpRequest($qstring, "GET", $opt, true);
+    }
+}
\ No newline at end of file
diff --git a/php-binance-api.php b/php-binance-api.php
index 81ba80ae..6c8aea01 100755
--- a/php-binance-api.php
+++ b/php-binance-api.php
@@ -29,10 +29,14 @@
  */
 class API
 {
+    use Margin, Futures;
+
     protected $base = 'https://api.binance.com/api/'; // /< REST endpoint for the currency exchange
     protected $baseTestnet = 'https://testnet.binance.vision/api/'; // /< Testnet REST endpoint for the currency exchange
     protected $wapi = 'https://api.binance.com/wapi/'; // /< REST endpoint for the withdrawals
     protected $sapi = 'https://api.binance.com/sapi/'; // /< REST endpoint for the supporting network API
+    protected $fapi = 'https://fapi.binance.com/'; // /< REST endpoint for the features API
+    protected $bapi = 'https://www.binance.com/bapi/'; // /< REST endpoint for the base API
     protected $stream = 'wss://stream.binance.com:9443/ws/'; // /< Endpoint for establishing websocket connections
     protected $streamTestnet = 'wss://testnet.binance.vision/ws/'; // /< Testnet endpoint for establishing websocket connections
     protected $api_key; // /< API key that you created in the binance website member area
@@ -1272,6 +1276,16 @@ protected function httpRequest(string $url, string $method = "GET", array $param
                 unset($params['sapi']);
                 $base = $this->sapi;
             }
+		
+            if (isset($params['fapi'])) {
+                unset($params['fapi']);
+                $base = $this->fapi;
+            }
+		
+            if (isset($params['bapi'])) {
+                unset($params['bapi']);
+                $base = $this->bapi;
+            }
         
             $query = $this->binance_build_query($params);
             $query = str_replace([ '%40' ], [ '@' ], $query);//if send data type "e-mail" then binance return: [Signature for this request is not valid.]
@@ -2367,10 +2381,10 @@ public function ticker($symbol, callable $callback)
     /**
      * chart Pulls /kline data and subscribes to @klines WebSocket endpoint
      *
-     * $api->chart(["BNBBTC"], "15m", function($api, $symbol, $chart) {
+     * $api->chart(["BNBBTC"], function($api, $symbol, $chart) {
      * echo "{$symbol} chart update\n";
      * print_r($chart);
-     * });
+     * }, "15m");
      *
      * @param $symbols string required symbols
      * @param $interval string time inteval