Add IQFeed Data Source

This is a very good opensource project for IQFeed :  https://github.com/mathpaquette/IQFeed.CSharpApiClient


There are also ones written in java or c++ if that would be fit into SQX better (https://github.com/Petersoj/IQFeed4j)


From the IQFeed website:

• Real-Time, TRUE Tick-by-Tick Data on US and Canadian Equities (NYSE, NASDAQ, NYSE MKT, Canadian Stock Exchanges) **
• Delayed data on exchanges not being received in real time (exchange fees may apply for delayed data)
• Real-Time Equity/Index Options and Forex Data Available for an additional fee
• Market Depth/Nasdaq Level II data available for an additional fee
• Real Time Index quotes **
• Over 700 market stats/breadth indicators (TICK, TRIN, etc), most of which update every 1 second!
• 180 calendar days of tick history (includes pre-post market) with microsecond timestamps (if available from the exchange feed) ***
• 11+ years of 1-Minute OHLCV historical data on exchanges/data authorized depending upon instrument and when we started collecting data.***
  • Forex back to February 2005
  • Eminis back to September 2005
  • US Stock/Futures/Indexes back to May 2007
  • London Stocks and FTSE Indexes back to February 2016
• Up to 80+ years of Daily, Weekly and Monthly OHLCVOI Historical data depending upon instrument and when we started collecting data. †
  • Indexes as far back as 1929
  • US Stocks as far back as 1994
  • Forex as far back as 1993
  • US Futures as far back as 1959
  • London Stocks and FTSE Indexes as far back as 1985
• Fundamental Data on US stocks
• 500 simultaneous symbols†† can be watched with basic subscription (up to 2500 at a time available for an additional fee)
• Real-Time streaming news from Benzinga Pro, RTTnews.com, PR Newswire, and Business Wire (other newswires available for an additional fee)