So my request message is this:

HIT,AAPL,60,20170216 174758,20160217 174758,,,,1

However, I get a response message saying !NO_DATA!
Am I getting something wrong with the formating?

Hello, Welcome to the forums. It looks like some of your parameters are out of order.

If you check this page, it has all of the details, or just drop into developer chat and I would be happy to explain it more in depth.

http://www.iqfeed.net/dev/api/docs/HistoricalviaTCPIP.cfm

Tim

Alright, so I have to pay 360 dollars to access the API documentation on top of the monthly fee I already pay to get the data itself? That seems absurd.

We provide a professional level of service to our customers as you see by the fast response to your inquiry. It appears you have already tried to hack your way toward using IQFeed in your application, which may be good enough for some of our users. There is no additional cost to doing this other than time and frustration. The level of support we provide to developers is unmatched and is provided for those who can't afford for their software to stop working because they took shortcuts or weren't aware of changes made to the API that could break their code. The API service includes full documentation, sample code, direct support from our development team, notification of changes, and access to pre-production systems or beta versions to allow you time to test your software before we release to the general public. At $360 per year, this should be one of the smallest investments you can make into your trading system.

There is cheap and free data out there. Many have come and gone over the years because they either provided poor service or had a bad financial model. Providing quality service is neither cheap nor easy.

We would love the opportunity to serve your needs and help ensure you have a trading system that will be operational for years to come.

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Jay Froscheiser
Vice President, Active Trader Products