Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)




"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
"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
"DTN feed was the only feed that consistently matched Bloomberg feed for BID/ASK data verification work these past years......DTN feed is a must for my supply & demand based trading using Cumulative Delta" - Comment from Public Forum Post
"I've never had DTN go out on me since switching. ******* would go down a couple times every month when I was using them." - Comment from Bryce in AL.
"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
"I will tell others who want to go into trading that DTN ProphetX is an invaluable tool, I don't think anyone can trade without it..." - Comment from Luther
"I am enjoying the feed very much - so superior to the broker provided feed I was previously using." - Comment from George
"DTN has never given me problems. It is incredibly stable. In fact I've occasionally lost the data feed from Interactive Brokers, but still been able to trade because I'm getting good data from DTN." - Comment from Leighton
"It’s so nice to be working with real professionals!" - Comment from Len
"I just wanted to let you know how fast and easy I found it to integrate IQFeed into our existing Java code using your JNI client. In my experience, such things almost never go so smoothly - great job!" - Comment from Nate
Home  Search  Register  Login  Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather
Follow DTNMarkets on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
»Forums Index »IQFeed Developer »IQFeed Developer Support »Streaming 5-second Interval Bars - Derivative Timing
Author Topic: Streaming 5-second Interval Bars - Derivative Timing (4 messages, Page 1 of 1)

Kyle_Springtech
-Interested User-
Posts: 2
Joined: Oct 4, 2022


Posted: Oct 4, 2022 08:46 AM          Msg. 1 of 4
So yesterday I was testing the speed of Streaming 5-second Interval Bars for the symbol "@ES#" and recorded that it took an average of about 320 milliseconds for my computer to receive the 5-second interval bar after the top of the 5-second interval. There is some variability in that amount of time after the top of the 5-second interval. The largest amount I recorded was 997 milliseconds.

I was using the StreamingBarsSocket project of the C# solution example in visual studio found here: http://www.iqfeed.net/dev/api.cfm

I was wondering where that time delay is coming from. Is that example project inefficient? Is the time delay coming from the amount of time it takes your system to compile/generate the 5-second Interval Bar? Is the market itself having to wait for certain trades to "complete"?

Any help is appreciated,
Kyle

DTN_Gary_Stephen
-DTN Guru-
Posts: 288
Joined: Jul 3, 2019


Posted: Oct 4, 2022 10:45 AM          Msg. 2 of 4
Kyle,

DTN does not maintain standards for how long a request "should" take. Transaction time can vary a great deal, depending upon your own internet connection, how much data you're requesting at once, how busy the markets are, and other factors.

Also, when it comes to the streaming interval bars, there is a relevant parameter called Update Interval. If this is set to 0 (or left at default), then a bar will not be closed until a tick after the bar has occurred. If you're doing one minute bars, the BC (bar complete) message for the bar ending at 10:00 o'clock will not be sent until a tick after 10:00:00 occurs. This can make BC messages appear to take longer to arrive. If you set update interval to one second or any amount of time that isn't 0, you will receive a BU (bar update) message anytime a change to the bar happens that has not already been sent. This will ensure that you always have the most recent information, even if a BC message has not been sent yet.

I hope this information is helpful!



Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist

Edited by DTN_Gary_Stephen on Oct 4, 2022 at 10:45 AM

Kyle_Springtech
-Interested User-
Posts: 2
Joined: Oct 4, 2022


Posted: Oct 4, 2022 10:50 AM          Msg. 3 of 4
I did not know about the update interval component. I believe that will help greatly for what I'm trying to accomplish.

Thanks for the help,
Kyle

DTN_Gary_Stephen
-DTN Guru-
Posts: 288
Joined: Jul 3, 2019


Posted: Oct 5, 2022 07:59 AM          Msg. 4 of 4
When you set the update interval to anything above 0, you will get more BU messages. A BU message is an update to the bar, which does not necessarily mean the bar is complete. A BC message tells you that the bar is complete, but as I said, it will only appear once a tick after the bar has occurred (which may not be immediate, especially for less-frequently traded symbols). But you can watch the BU messages, and compare them to the time to know that a bar has passed without having to wait for the BC message.

By the way, BU messages can also appear when a past bar is updated, usually because a tick has been updated and this changes the bar totals in some way.

Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist
 

 

Time: Sun February 5, 2023 10:43 AM CFBB v1.2.0 31 ms.
© AderSoftware 2002-2003