diff --git a/README.md b/README.md
index 99acc02e7..831494ca5 100644
--- a/README.md
+++ b/README.md
@@ -320,4 +320,23 @@ ElastAlert is licensed under the Apache License, Version 2.0: http://www.apache.
 
 ### Read the documentation at [Read the Docs](http://elastalert.readthedocs.org).
 
+### Bigdata Boutique Additions
+There is now a `must_not` field which behaves similarly to the filter field, only excludes hits.
+
+A cron scheduler is added. This works by running jobs based on a cron scheduler rather than
+the default interval scheduling. To use this, instead of defining "run_every" in the rule,
+use cron_schedule. See the below example.
+
+`cron_schedule: "0 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 * * *"`
+
+Format is:
+minute (0-59), hour (0-23), day of month (1-31), month (1-12), day of week (MON-SUN)
+
+Fields are separated by space, values separated by comma, * for all values
+
+notice that cron_schedule is currently only supported for use_count_query uses.
+
+
 ### Questions? Drop by #elastalert on Freenode IRC.
+### BDB enhancements Questions? Contact us at info@bigdataboutique.com
+
diff --git a/config.yaml.example b/config.yaml.example
index 9d9176382..572dbf5a6 100644
--- a/config.yaml.example
+++ b/config.yaml.example
@@ -53,6 +53,10 @@ es_port: 9200
 #client_cert: /path/to/client_cert.pem
 #client_key: /path/to/client_key.key
 
+# Add custom http_headers to the request to elasticsearch
+#http_headers:
+#  Bearer: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c
+
 # The index on es_host which is used for metadata storage
 # This can be a unmapped index, but it is recommended that you run
 # elastalert-create-index to set a mapping
diff --git a/docs/source/ruletypes.rst b/docs/source/ruletypes.rst
index ff3763712..e3731d170 100644
--- a/docs/source/ruletypes.rst
+++ b/docs/source/ruletypes.rst
@@ -553,9 +553,9 @@ The currently supported versions of Kibana Discover are:
 
 - `5.6`
 - `6.0`, `6.1`, `6.2`, `6.3`, `6.4`, `6.5`, `6.6`, `6.7`, `6.8`
-- `7.0`, `7.1`, `7.2`, `7.3`
+- `7.0`, `7.1`, `7.2`, `7.3`, `7.4`, `7.5`, `7.6`, `7.7`, `7.8`
 
-``kibana_discover_version: '7.3'``
+``kibana_discover_version: '7.8'``
 
 kibana_discover_index_pattern_id
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/elastalert/__init__.py b/elastalert/__init__.py
index 55bfdb32f..6dc3f82e9 100644
--- a/elastalert/__init__.py
+++ b/elastalert/__init__.py
@@ -23,6 +23,7 @@ def __init__(self, conf):
                                                   verify_certs=conf['verify_certs'],
                                                   ca_certs=conf['ca_certs'],
                                                   connection_class=RequestsHttpConnection,
+                                                  headers=conf['http_headers'],
                                                   http_auth=conf['http_auth'],
                                                   timeout=conf['es_conn_timeout'],
                                                   send_get_body_as=conf['send_get_body_as'],
diff --git a/elastalert/alerts.py b/elastalert/alerts.py
index f2f31853f..51b55fdf5 100644
--- a/elastalert/alerts.py
+++ b/elastalert/alerts.py
@@ -1962,9 +1962,12 @@ def __init__(self, rule):
 
     def alert(self, matches):
         """ Each match will trigger a POST to the specified endpoint(s). """
+        alert_subject = self.create_custom_title(matches)
         for match in matches:
             payload = match if self.post_all_values else {}
             payload.update(self.post_static_payload)
+            payload["alert_subject"] = alert_subject
+            payload["alert_text"] = str(BasicMatchString(self.rule, match))
             for post_key, es_key in list(self.post_payload.items()):
                 payload[post_key] = lookup_es_key(match, es_key)
             headers = {
diff --git a/elastalert/create_index.py b/elastalert/create_index.py
index a0858da70..639b3f8fb 100644
--- a/elastalert/create_index.py
+++ b/elastalert/create_index.py
@@ -204,6 +204,7 @@ def main():
         send_get_body_as = data.get('send_get_body_as', 'GET')
         ca_certs = data.get('ca_certs')
         client_cert = data.get('client_cert')
+        http_headers = data.get('http_headers')
         client_key = data.get('client_key')
         index = args.index if args.index is not None else data.get('writeback_index')
         alias = args.alias if args.alias is not None else data.get('writeback_alias')
@@ -229,6 +230,7 @@ def main():
         send_get_body_as = args.send_get_body_as
         ca_certs = None
         client_cert = None
+        http_headers = None
         client_key = None
         index = args.index if args.index is not None else input('New index name? (Default elastalert_status) ')
         if not index:
@@ -254,6 +256,7 @@ def main():
         use_ssl=use_ssl,
         verify_certs=verify_certs,
         connection_class=RequestsHttpConnection,
+        headers=http_headers,
         http_auth=http_auth,
         url_prefix=url_prefix,
         send_get_body_as=send_get_body_as,
diff --git a/elastalert/elastalert.py b/elastalert/elastalert.py
index b078c86db..5f54b115b 100755
--- a/elastalert/elastalert.py
+++ b/elastalert/elastalert.py
@@ -20,6 +20,7 @@
 import dateutil.tz
 import pytz
 from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.triggers.cron import CronTrigger
 from croniter import croniter
 from elasticsearch.exceptions import ConnectionError
 from elasticsearch.exceptions import ElasticsearchException
@@ -198,7 +199,7 @@ def get_index(rule, starttime=None, endtime=None):
 
     @staticmethod
     def get_query(filters, starttime=None, endtime=None, sort=True, timestamp_field='@timestamp', to_ts_func=dt_to_ts, desc=False,
-                  five=False):
+                  five=False, must_not=[]):
         """ Returns a query dict that will apply a list of filters, filter by
         start and end time, and sort results by timestamp.
 
@@ -211,14 +212,15 @@ def get_query(filters, starttime=None, endtime=None, sort=True, timestamp_field=
         starttime = to_ts_func(starttime)
         endtime = to_ts_func(endtime)
         filters = copy.copy(filters)
-        es_filters = {'filter': {'bool': {'must': filters}}}
+        es_filters = {'filter': {'bool': {'filter': filters, 'must_not': must_not}}}
         if starttime and endtime:
-            es_filters['filter']['bool']['must'].insert(0, {'range': {timestamp_field: {'gt': starttime,
-                                                                                        'lte': endtime}}})
+            es_filters['filter']['bool']['filter'].insert(0, {'range': {timestamp_field: {'gt': starttime,
+                                                                                          'lte': endtime}}})
         if five:
             query = {'query': {'bool': es_filters}}
         else:
-            query = {'query': {'filtered': es_filters}}
+            raise Exception('Unsupported operation - the five parameter is not supported')
+
         if sort:
             query['sort'] = [{timestamp_field: {'order': 'desc' if desc else 'asc'}}]
         return query
@@ -358,7 +360,7 @@ def get_hits(self, rule, starttime, endtime, index, scroll=False):
             endtime,
             timestamp_field=rule['timestamp_field'],
             to_ts_func=rule['dt_to_ts'],
-            five=rule['five'],
+            five=rule['five'], must_not=rule['must_not'],
         )
         if self.thread_data.current_es.is_atleastsixsix():
             extra_args = {'_source_includes': rule['include']}
@@ -448,7 +450,7 @@ def get_hits_count(self, rule, starttime, endtime, index):
             timestamp_field=rule['timestamp_field'],
             sort=False,
             to_ts_func=rule['dt_to_ts'],
-            five=rule['five']
+            five=rule['five'], must_not=rule['must_not'],
         )
 
         try:
@@ -499,7 +501,7 @@ def get_hits_terms(self, rule, starttime, endtime, index, key, qk=None, size=Non
             timestamp_field=rule['timestamp_field'],
             sort=False,
             to_ts_func=rule['dt_to_ts'],
-            five=rule['five']
+            five=rule['five'], must_not=rule['must_not'],
         )
         if size is None:
             size = rule.get('terms_size', 50)
@@ -547,7 +549,7 @@ def get_hits_aggregation(self, rule, starttime, endtime, index, query_key, term_
             timestamp_field=rule['timestamp_field'],
             sort=False,
             to_ts_func=rule['dt_to_ts'],
-            five=rule['five']
+            five=rule['five'], must_not=rule['must_not'],
         )
         if term_size is None:
             term_size = rule.get('terms_size', 50)
@@ -719,7 +721,7 @@ def set_starttime(self, rule, endtime):
 
         # Use buffer for normal queries, or run_every increments otherwise
         # or, if scan_entire_timeframe, use timeframe
-
+        #TODO handle cron interval for non "use_count_query" case
         if not rule.get('use_count_query') and not rule.get('use_terms_query'):
             if not rule.get('scan_entire_timeframe'):
                 buffer_time = rule.get('buffer_time', self.buffer_time)
@@ -739,11 +741,14 @@ def set_starttime(self, rule, endtime):
             self.adjust_start_time_for_interval_sync(rule, endtime)
 
         else:
-            if not rule.get('scan_entire_timeframe'):
-                # Query from the end of the last run, if it exists, otherwise a run_every sized window
-                rule['starttime'] = rule.get('previous_endtime', endtime - self.run_every)
+            if not rule.get('cron_schedule'):
+                if not rule.get('scan_entire_timeframe'):
+                    # Query from the end of the last run, if it exists, otherwise a run_every sized window
+                    rule['starttime'] = rule.get('previous_endtime', endtime - self.run_every)
+                else:
+                    rule['starttime'] = rule.get('previous_endtime', endtime - rule['timeframe'])
             else:
-                rule['starttime'] = rule.get('previous_endtime', endtime - rule['timeframe'])
+                rule['starttime'] = endtime - rule['timeframe']
 
     def adjust_start_time_for_overlapping_agg_query(self, rule):
         if rule.get('aggregation_query_element'):
@@ -871,15 +876,16 @@ def run_rule(self, rule, endtime, starttime=None):
         rule['original_starttime'] = rule['starttime']
         rule['scrolling_cycle'] = 0
 
+        self.thread_data.num_hits = 0
+        self.thread_data.num_dupes = 0
+        self.thread_data.cumulative_hits = 0
+
         # Don't run if starttime was set to the future
         if ts_now() <= rule['starttime']:
             logging.warning("Attempted to use query start time in the future (%s), sleeping instead" % (starttime))
             return 0
 
         # Run the rule. If querying over a large time period, split it up into segments
-        self.thread_data.num_hits = 0
-        self.thread_data.num_dupes = 0
-        self.thread_data.cumulative_hits = 0
         segment_size = self.get_segment_size(rule)
 
         tmp_endtime = rule['starttime']
@@ -1030,13 +1036,22 @@ def init_rule(self, new_rule, new=True):
                 continue
             new_rule[prop] = rule[prop]
 
-        job = self.scheduler.add_job(self.handle_rule_execution, 'interval',
-                                     args=[new_rule],
-                                     seconds=new_rule['run_every'].total_seconds(),
-                                     id=new_rule['name'],
-                                     max_instances=1,
-                                     jitter=5)
-        job.modify(next_run_time=datetime.datetime.now() + datetime.timedelta(seconds=random.randint(0, 15)))
+        cron_schedule = new_rule.get('cron_schedule')
+        # Cron trigger - shaig 16.3
+        if cron_schedule is not None:
+            job = self.scheduler.add_job(self.handle_rule_execution, CronTrigger.from_crontab(cron_schedule),
+                                         args=[new_rule],
+                                         id=new_rule['name'],
+                                         max_instances=1,
+                                         jitter=5)
+        else:
+            job = self.scheduler.add_job(self.handle_rule_execution, 'interval',
+                                         args=[new_rule],
+                                         seconds=new_rule['run_every'].total_seconds(),
+                                         id=new_rule['name'],
+                                         max_instances=1,
+                                         jitter=5)
+            job.modify(next_run_time=datetime.datetime.now() + datetime.timedelta(seconds=random.randint(0, 15)))
 
         return new_rule
 
diff --git a/elastalert/enhancements.py b/elastalert/enhancements.py
index 6cc1cdd57..e70570b1d 100644
--- a/elastalert/enhancements.py
+++ b/elastalert/enhancements.py
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+import datetime
+
 from .util import pretty_ts
 
 
@@ -23,3 +25,25 @@ def process(self, match):
 class DropMatchException(Exception):
     """ ElastAlert will drop a match if this exception type is raised by an enhancement """
     pass
+
+
+class CopyFullRuleEnhancement(BaseEnhancement):
+    # The enhancement is run against every match
+    # The match is passed to the process function where it can be modified in any way
+    # ElastAlert will do this for each enhancement linked to a rule
+    def process(self, match):
+        rule_copy = dict(self.rule)
+        rule_copy.pop("type")
+        rule_copy.pop("match_enhancements")
+        rule_copy.pop("alert")
+        keys = []
+        for key in list(rule_copy.keys()):
+            if isinstance(rule_copy[key], datetime.timedelta) or callable(rule_copy[key]):
+                keys.append(key)
+        rule_copy["type"] = type(self.rule["type"]).__name__
+        match["rule"] = rule_copy
+
+
+class CopyRuleTypeEnhancement(BaseEnhancement):
+    def process(self, match):
+        match["rule_type"] = type(self.rule["type"]).__name__
diff --git a/elastalert/kibana_discover.py b/elastalert/kibana_discover.py
index 7e4dbb5d1..b332facce 100644
--- a/elastalert/kibana_discover.py
+++ b/elastalert/kibana_discover.py
@@ -14,7 +14,7 @@
 kibana_default_timedelta = datetime.timedelta(minutes=10)
 
 kibana5_kibana6_versions = frozenset(['5.6', '6.0', '6.1', '6.2', '6.3', '6.4', '6.5', '6.6', '6.7', '6.8'])
-kibana7_versions = frozenset(['7.0', '7.1', '7.2', '7.3'])
+kibana7_versions = frozenset(['7.0', '7.1', '7.2', '7.3', '7.4', '7.5', '7.6', '7.7', '7.8', '7.9'])
 
 def generate_kibana_discover_url(rule, match):
     ''' Creates a link for a kibana discover app. '''
diff --git a/elastalert/loaders.py b/elastalert/loaders.py
index 771194768..5db008f90 100644
--- a/elastalert/loaders.py
+++ b/elastalert/loaders.py
@@ -199,6 +199,8 @@ def load_yaml(self, filename):
             # Special case for merging filters - if both files specify a filter merge (AND) them
             if 'filter' in rule and 'filter' in loaded:
                 rule['filter'] = loaded['filter'] + rule['filter']
+            if 'must_not' in rule and 'must_not' in loaded:
+                rule['must_not'] = loaded['must_not'] + rule['must_not']
 
             loaded.update(rule)
             rule = loaded
@@ -274,6 +276,7 @@ def load_options(self, rule, conf, filename, args=None):
         rule.setdefault('query_delay', datetime.timedelta(seconds=0))
         rule.setdefault('timestamp_field', '@timestamp')
         rule.setdefault('filter', [])
+        rule.setdefault('must_not', [])
         rule.setdefault('timestamp_type', 'iso')
         rule.setdefault('timestamp_format', '%Y-%m-%dT%H:%M:%SZ')
         rule.setdefault('_source_enabled', True)
@@ -315,6 +318,10 @@ def _dt_to_ts_with_format(dt):
             rule.setdefault('client_cert', conf.get('client_cert'))
             rule.setdefault('client_key', conf.get('client_key'))
 
+        # Add supoprt for custom http headers
+        if 'http_headers' in conf:
+            rule.setdefault('http_headers', conf.get('http_headers'))
+
         # Set HipChat options from global config
         rule.setdefault('hipchat_msg_color', 'red')
         rule.setdefault('hipchat_domain', 'api.hipchat.com')
@@ -366,6 +373,7 @@ def _dt_to_ts_with_format(dt):
         rule['include'] = list(set(include))
 
         # Check that generate_kibana_url is compatible with the filters
+        # TODO must_not support ?
         if rule.get('generate_kibana_link'):
             for es_filter in rule.get('filter'):
                 if es_filter:
diff --git a/elastalert/ruletypes.py b/elastalert/ruletypes.py
index 2f1d2f82c..00ac4c621 100644
--- a/elastalert/ruletypes.py
+++ b/elastalert/ruletypes.py
@@ -318,12 +318,14 @@ def append(self, event):
         This will also pop the oldest events and call onRemoved on them until the
         window size is less than timeframe. """
         self.data.add(event)
-        self.running_count += event[1]
+        if event and event[1]:
+            self.running_count += event[1]
 
         while self.duration() >= self.timeframe:
             oldest = self.data[0]
             self.data.remove(oldest)
-            self.running_count -= oldest[1]
+            if oldest and oldest[1]:
+                self.running_count -= oldest[1]
             self.onRemoved and self.onRemoved(oldest)
 
     def duration(self):
@@ -363,7 +365,8 @@ def append_middle(self, event):
         # Append left if ts is earlier than first event
         if self.get_ts(self.data[0]) > ts:
             self.data.appendleft(event)
-            self.running_count += event[1]
+            if event and event[1]:
+                self.running_count += event[1]
             return
 
         # Rotate window until we can insert event
@@ -374,7 +377,8 @@ def append_middle(self, event):
                 # This should never happen
                 return
         self.data.append(event)
-        self.running_count += event[1]
+        if event and event[1]:
+            self.running_count += event[1]
         self.data.rotate(-rotation)
 
 
diff --git a/elastalert/schema.yaml b/elastalert/schema.yaml
index 1241315dc..10cf4ebcd 100644
--- a/elastalert/schema.yaml
+++ b/elastalert/schema.yaml
@@ -217,7 +217,7 @@ properties:
   ### Kibana Discover App Link
   generate_kibana_discover_url: {type: boolean}
   kibana_discover_app_url: {type: string, format: uri}
-  kibana_discover_version: {type: string, enum: ['7.3', '7.2', '7.1', '7.0', '6.8', '6.7', '6.6', '6.5', '6.4', '6.3', '6.2', '6.1', '6.0', '5.6']}
+  kibana_discover_version: {type: string, enum: ['7.9', '7.8', '7.7', '7.6', '7.5', '7.4', '7.3', '7.2', '7.1', '7.0', '6.8', '6.7', '6.6', '6.5', '6.4', '6.3', '6.2', '6.1', '6.0', '5.6']}
   kibana_discover_index_pattern_id: {type: string, minLength: 1}
   kibana_discover_columns: {type: array, items: {type: string, minLength: 1}, minItems: 1}
   kibana_discover_from_timedelta: *timedelta
diff --git a/elastalert/test_rule.py b/elastalert/test_rule.py
index 06100aa0f..61c9707e8 100644
--- a/elastalert/test_rule.py
+++ b/elastalert/test_rule.py
@@ -77,7 +77,7 @@ def test_file(self, conf, args):
             endtime=end_time,
             timestamp_field=ts,
             to_ts_func=conf['dt_to_ts'],
-            five=conf['five']
+            five=conf['five'], must_not=conf['must_not'],
         )
         index = ElastAlerter.get_index(conf, start_time, end_time)
 
@@ -106,7 +106,7 @@ def test_file(self, conf, args):
             timestamp_field=ts,
             to_ts_func=conf['dt_to_ts'],
             sort=False,
-            five=conf['five']
+            five=conf['five'], must_not=conf['must_not'],
         )
         try:
             res = es_client.count(index, doc_type=doc_type, body=count_query, ignore_unavailable=True)
diff --git a/elastalert/util.py b/elastalert/util.py
index bbb0600ff..426377115 100644
--- a/elastalert/util.py
+++ b/elastalert/util.py
@@ -338,6 +338,7 @@ def build_es_conn_config(conf):
     parsed_conf['ca_certs'] = None
     parsed_conf['client_cert'] = None
     parsed_conf['client_key'] = None
+    parsed_conf['http_headers'] = None
     parsed_conf['http_auth'] = None
     parsed_conf['es_username'] = None
     parsed_conf['es_password'] = None
@@ -379,6 +380,9 @@ def build_es_conn_config(conf):
     if 'client_cert' in conf:
         parsed_conf['client_cert'] = conf['client_cert']
 
+    if 'http_headers' in conf:
+        parsed_conf['http_headers'] = conf['http_headers']
+
     if 'client_key' in conf:
         parsed_conf['client_key'] = conf['client_key']
 
diff --git a/tests/kibana_discover_test.py b/tests/kibana_discover_test.py
index f06fe4e0c..ae5c8bca1 100644
--- a/tests/kibana_discover_test.py
+++ b/tests/kibana_discover_test.py
@@ -38,7 +38,7 @@ def test_generate_kibana_discover_url_with_kibana_5x_and_6x(kibana_version):
     assert url == expectedUrl
 
 
-@pytest.mark.parametrize("kibana_version", ['7.0', '7.1', '7.2', '7.3'])
+@pytest.mark.parametrize("kibana_version", ['7.0', '7.1', '7.2', '7.3', '7.4', '7.5', '7.6', '7.7', '7.8', '7.9'])
 def test_generate_kibana_discover_url_with_kibana_7x(kibana_version):
     url = generate_kibana_discover_url(
         rule={
@@ -171,7 +171,7 @@ def test_generate_kibana_discover_url_with_from_timedelta():
     url = generate_kibana_discover_url(
         rule={
             'kibana_discover_app_url': 'http://kibana:5601/#/discover',
-            'kibana_discover_version': '7.3',
+            'kibana_discover_version': '7.9',
             'kibana_discover_index_pattern_id': 'd6cabfb6-aaef-44ea-89c5-600e9a76991a',
             'kibana_discover_from_timedelta': timedelta(hours=1),
             'timestamp_field': 'timestamp'
@@ -204,7 +204,7 @@ def test_generate_kibana_discover_url_with_from_timedelta_and_timeframe():
     url = generate_kibana_discover_url(
         rule={
             'kibana_discover_app_url': 'http://kibana:5601/#/discover',
-            'kibana_discover_version': '7.3',
+            'kibana_discover_version': '7.9',
             'kibana_discover_index_pattern_id': 'd6cabfb6-aaef-44ea-89c5-600e9a76991a',
             'kibana_discover_from_timedelta': timedelta(hours=1),
             'timeframe': timedelta(minutes=20),
@@ -238,7 +238,7 @@ def test_generate_kibana_discover_url_with_to_timedelta():
     url = generate_kibana_discover_url(
         rule={
             'kibana_discover_app_url': 'http://kibana:5601/#/discover',
-            'kibana_discover_version': '7.3',
+            'kibana_discover_version': '7.9',
             'kibana_discover_index_pattern_id': 'd6cabfb6-aaef-44ea-89c5-600e9a76991a',
             'kibana_discover_to_timedelta': timedelta(hours=1),
             'timestamp_field': 'timestamp'
@@ -271,7 +271,7 @@ def test_generate_kibana_discover_url_with_to_timedelta_and_timeframe():
     url = generate_kibana_discover_url(
         rule={
             'kibana_discover_app_url': 'http://kibana:5601/#/discover',
-            'kibana_discover_version': '7.3',
+            'kibana_discover_version': '7.9',
             'kibana_discover_index_pattern_id': 'd6cabfb6-aaef-44ea-89c5-600e9a76991a',
             'kibana_discover_to_timedelta': timedelta(hours=1),
             'timeframe': timedelta(minutes=20),
@@ -305,7 +305,7 @@ def test_generate_kibana_discover_url_with_timeframe():
     url = generate_kibana_discover_url(
         rule={
             'kibana_discover_app_url': 'http://kibana:5601/#/discover',
-            'kibana_discover_version': '7.3',
+            'kibana_discover_version': '7.9',
             'kibana_discover_index_pattern_id': 'd6cabfb6-aaef-44ea-89c5-600e9a76991a',
             'timeframe': timedelta(minutes=20),
             'timestamp_field': 'timestamp'