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"IQFeed version 4 is a real screamer compared to anything else I have seen." - Comment from Tom
"If someone needs the best quality data and backfill beyond what their broker provides at a rate that is the best in the industry, I highly recommend IQFeed." - Comment from Josh via Public Forum
"Thanks for the great product and support. During this week of high volume trading, my QuoteTracker + IQ Feed setup never missed a beat. Also, thanks for your swiftness in responding to data issues. I was on ******* for a few years before I made the switch over early this year, and wish I had done it a long time ago." - Comment from Ken
"With HUGE volume on AAPL and RIMM for 2 days, everyone in a trading room was whining about freezes, crashes and lag with *******, RealTick, TS and Cyber. InvestorRT with IQFeed was rock solid. I mean SOLID!" - Comment from Public IRC Chat
"I like you guys better than *******...much more stable and a whole lot fewer issues." - Comment from Philip
"I've been using IQFeed 4 in a multi-threaded situation for the last week or two on 2600 symbols or so with 100 simultaneous daily charts, and I have had 100% responsiveness." - Comment from Scott
"My broker in Davenport suggested I give you a try as he uses your service and says its the best." - Comment from Bill via RT Chat
"Everything is working great ! Very impressive client. The news refreshes better and is more pertinent than the ******* feed I paid $ 100/month for. I Also like the charts a lot." - Comment from Leon
"There is no doubt that IQFeed is the best data provider. I am very satisfied with your services. And IQFeed is the only one that I would recommend to my friends. Now, most of them are using your product in China." - Comment from Zhezhe
"I am enjoying the feed very much - so superior to the broker provided feed I was previously using." - Comment from George
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Lav2018 has contributed to 5 posts out of 18549 total posts (0.03%) in 102 days (0.05 posts per day).

20 Most recent posts:
IQFeed Developer Support » chronological order of ticks received? Apr 19, 2018 04:34 AM (Total replies: 1)

Am I safe with the assumption that the messages I receive for one symbol will be in chronological order, or do I need to code for the possibility that an exchange or IQFEED may send a tick out of chronological order occasionally?

Particularly, if my requests are

S,SELECT UPDATE FIELDS,Symbol,Most Recent Trade,Most Recent Trade Time
t@ES#

Will Most Recent Trade always be the most recent? Or do I need to use CPU checking its timestamp against the previous tick's timestamp?

Data and Content Support » Can't Connect via iqconnect.exe Apr 19, 2018 12:04 AM (Total replies: 10)

I ran into this same problem. Found this thread in a search. I fixed my problem already, but for anyone just starting out with the API:

the example on http://www.iqfeed.net/dev/api/docs/docs52/InitializingTheFeed.cfm has small typo so can't copy/paste it into your code and replace with your parameters

IQConnect.exe ?product YOUR_PRODUCT_HERE?version 1.0.0.0 ?login 100000 ?password 1234 ?autoconnect

It is missing a space between YOUR_PRODUCT_HERE and -version. Once I fixed that it works.

IQFeed Developer Support » C# sample program for Leve1Socket Apr 5, 2018 02:51 PM (Total replies: 5)

Makes sense. Thanks.

IQFeed Developer Support » C# sample program for Leve1Socket Apr 4, 2018 08:55 PM (Total replies: 5)

I've found all of the sample C# programs very helpful and the comments make for easy following. I have one question about the Level1Socket program.

In Level1SocketForm.cs, lines 201-202 are:

 
// move on to the next message. This isn't very efficient but it is simple (which is the focus of this example).
sData = sData.Substring(sLine.Length + 1);


Do you have any examples showing more efficient ways? If not, can you please point me towards a better solution. Thank you.

IQFeed Developer Support » How are derivative bars built? Mar 15, 2018 04:57 AM (Total replies: 1)

I have a few technical questions regarding derivative bars in IQfeed. Apologies if I missed this information in the documentation, but I could not find it.

1. Lets say I have requested streaming bars with an interval of 60 seconds. In the messages my client receive, what will [DateTime] represent? Will it be the start time of the interval or the end time of the interval? E.g. Would 12:00:00 be for interval 2:00:00 to 12:00:59, or interval 11:59:01 to 12:00:00?

2. Within IQFeed, what determines when a bar is "finished" being built and sent out to my client? Is it my internal computer clock, IQfeed's server clock, or timestamps on ticks? If it is timestamps of ticks, then I suppose the bar won't be sent to the client until a tick with timestamp OUTSIDE that interval has arrived. That could cause delays in instruments with low volume.


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