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"I used to have *******, but they are way more money for the same thing. I have had no probs with data from DTN since switching over." - Comment from Public Forum Post
"I ran your IQFeed DDE vs. my broker vs. a level II window for some slow-moving options. I would see the level II quote change, then your feed update instantaneously. My broker's DDE, however, would take as much as 30 seconds to update. I am not chasing milliseconds, but half a minute is unacceptable." - Comment from Rob
"I'm very glad I switched to IQFeed. It's working perfectly with no lag, even during fast market conditions." - Comment from Andy via Email
"Thank God for your Data Feed as the only Zippers I see are on my pants (LOL), and no more 200 pip spikes to mess up charts." - Comment from Spiro via Email
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"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 was with ******* for 4 years at $230 a month, this is a huge savings for me, GOD BLESS YOU PEOPLE," - Comment from T.S. via Email
"I am keeping IQFeed, much better reliabilty than *******. I may refer a few other people in the office to switch as well." - Comment from Don
"Boy, probably spent a thousand hours trying to get ******* API to work right. And now two hours to have something running with IQFeed. Hmmm, guess I was pretty stupid to fight rather than switch all this time. And have gotten more customer service from you guys already than total from them… in five years." - Comment from Jim
"As a past ******* customer(and not a happy one), IQ Feed by DTN is a much better and cheaper product with great customer support. I have had no problems at all since switching over." - Comment from Public Forum
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Viewing User Profile for: gcarleu
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Joined: Apr 4, 2018 12:23 PM
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gcarleu has contributed to 3 posts out of 19450 total posts (0.02%) in 727 days (0.00 posts per day).

20 Most recent posts:
IQFeed Developer Support » IQFeed Maximum Messages per Second Apr 4, 2018 01:18 PM (Total replies: 2)

Last try sending the file up.

- Greg

IQFeed Developer Support » IQFeed Maximum Messages per Second Apr 4, 2018 01:16 PM (Total replies: 2)

The file didn't make it up with the original post.

- Greg

IQFeed Developer Support » IQFeed Maximum Messages per Second Apr 4, 2018 01:13 PM (Total replies: 2)

I am getting substantial lags in the IQFeed data. The lags are measured using the timestamp out of IQFeed and comparing it to the system time when the message enters my software.

Of course, there is an offset between the IQFeed clock and my local system clock. My hope is that the time difference would remain fairly constant and during low traffic times of day, it does. However, during high traffic periods, such as the last 30 minutes of trading, the offset varies a lot, sometimes it just keeps increasing.

Does anyone have any information on how many tickers and how many messages per second IQFeed can support?

I have attached a Python 3.6 program that I am using to do the measurement. First, you will need to start IQLinkLauncher and then run the program as "python IQTestClient.py"

Thanks in advance

- Greg


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