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"I noticed that ******* quotes locked up shortly after the interest rate announcement yesterday while yours stayed stable." - Comment from Ron in Utah
"I would just like to say that IQFeed version 4 is running very well and I am very happy with its performance. I would also like to extend a big thanks for the fast and efficient help that I always receive. My questions and concerns are always addressed promptly. Way to go!" - Comment from Josh in CO.
"The service is great, I see a noticeable improvement in my volume profiles over [broker]'s data feed" - Comment from Larry
"I'm satisfied with IQFeed. It's the most reliable and fastest quote feed I have ever used. Although I'm a resident in China, it's still very fast!" - Comment from Xiaofei
"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
"I just wanted to tell you what a fine job you have been doing. While *******, from what I hear, has been down and out, off and on, IQ feed has held like a champ this week." - Comment from Shirin
"I cannot believe what a difference it makes trading with ProphetX!" - Comment from Bruce in Los Angeles
"I like you guys better than *******...much more stable and a whole lot fewer issues." - Comment from Philip
"Just a thank you for the very helpful and prompt assistance and services. You provided me with noticeably superior service in my setup compared to a couple of other options I had looked at." - Comment from John
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ssg10
-Interested User-
Posts: 1
Joined: May 8, 2013
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Posted: May 8, 2013 03:22 AM

Msg. 1 of 4
I tried to open up connection with iqfeed but it has problems:
Can somebody help?
>> Q=iqf(4xxxx,6xxxx) Warning: Out of range or non-integer values truncated during conversion to character. > In iqf.iqf>iqf.iqf at 44 Warning: Out of range or non-integer values truncated during conversion to character. > In iqf.iqf>iqf.iqf at 44
Q =
iqf with properties:
User: 4xxxx Password: 6xxxxxx Port: {[1x1 System.Net.Sockets.Socket]} PortName: {'Admin'}
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DTN_LorenF
-DTN Technical Support-
Posts: 228
Joined: May 11, 2004
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Posted: May 8, 2013 09:07 AM

Msg. 2 of 4
SSQ10
Is this the first time you have setup the software and connection?
We do recomend you contact MATHLAB support for additional support, The will assist you with the software and connection.
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mongfa
-Interested User-
Posts: 4
Joined: Jul 27, 2014
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Posted: Jul 27, 2014 12:41 PM

Msg. 3 of 4
. Edited by mongfa on Jul 27, 2014 at 12:44 PM
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altmany
-Interested User-
Posts: 69
Joined: Jul 30, 2018
IQML - IQFeed-MATLAB connector
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Posted: Mar 12, 2019 06:01 AM

Msg. 4 of 4
In case anyone stumbles on a similar error, I believe that it was caused because the Matlab iqf function (part of the Trading Toolbox) expects the username and password in string format, i.e. iqf('1234','9876') and not iqf(1234,9876). Instead of using the Trading Toolbox to connect Matlab to IQFeed, consider using the IQML connector. IQML was optimized for run-time performance (speed), ease-of-use, and reliability. It comes with extensive documentation, and supports the entire IQFeed API. IQML works with the core Matlab; no toolbox is required. It works on all Matlab releases since R2008a, on both Windows and Mac, using IQFeed 5.0 or newer. IQML was developed independently as a commercial 3rd-party product; it is not affiliated with MathWorks or DTN. The connector is actively maintained and supported. Main features: - both blocking (snapshot) and non-blocking (streaming) data queries
- parallelized requests for super-fast data query responses
- live Level 1 top-of-book market data (quotes and trades)
- live Level 2 market-depth data
- historical and intraday market data (individual ticks or interval bars)
- fundamental info on assets
- options and futures chains lookup (with market data, Greeks)
- symbols and market codes lookup
- news headlines, story-counts, and complete news stories, with user-specified filters
- user-defined Matlab callback functions to IQFeed messages and market triggers
- user-defined alerts on streaming market events (news/quotes/interval-bar/regional triggers)
- connection stats (continuous update)
- programmatic connect/disconnect
https://UndocumentedMatlab.com/IQML Note: I am not a DTN employee; my post reflects my personal opinion and not necessarily DTN's
- Yair IQML - IQFeed-Matlab connector https://UndocumentedMatlab.com/IQML
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