Hello, this is Gary with DTN IQFeed API Support. I apologize for the delay in responding.
Here's the documentation about the Market Summary info: http://www.iqfeed.net/dev/api/docs/docsBeta/MarketSummaryviaTCPIP.cfm
To summarize, there are three types of requests: EDS, FDS, and 5MS. Each allows you to retrieve a market summary, based on a commodity type and exchange. EDS and FDS are daily, while 5MS is a five minute snapshot.
The syntax is:
EDS,Security Type,Group ID,Date
would return a daily market summary for Equities (code 1) on the NASDAQ exchange (code 5) for September 3, 2019.
You can view a list of the codes with the following commands (which are also listed at http://www.iqfeed.net/dev/api/docs/docsBeta/SymbolLookupviaTCPIP.cfm):
returns a list of security types:
4,MONEY,Money Market Fund,
39,FOPTION_IV,FOption Implied Volatility,
SLM returns a list of markets:
1,NGM,Nasdaq Global Market,5,NASDAQ,
2,NCM,National Capital Market,5,NASDAQ,
3,OTC,Nasdaq other OTC,5,NASDAQ,
4,OTCBB,Nasdaq OTC Bulletin Board,5,NASDAQ,
6,NYSE_AMERICAN,NYSE American (Equities and Bonds),6,NYSE_AMERICAN,
7,NYSE,New York Stock Exchange,7,NYSE,
181,COP-LION,Crude Oil Postings Lion,170,COP-HUNT,
182,COP-SUNOCO,Crude Oil Postings SUNOCO,170,COP-HUNT,
The response is a list of all symbols that match your commodity type and market:
I hope that answers your question! If you have any follow-up questions, please let me know!
DTN IQFeed Implementation Support Specialist