Allow picking stocks from multiple markets

[agrawalo]

Can you extend this app to support picking stocks from multiple markets? For example NASDAQ, NSE, BSE, SGX, Shanghai Stock Exchange, etc.

This is because I don't want to restrict people to trade on one market, some have specialization in the Singapore market, some in the US market, some in Indian market and Shanghai market, etc.

[ghoshbishakh]

@agrawalo contributions are welcome! :)