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)




"I am very pleased with the DTNIQ system for quotes and news." - Comment from Larry
"I am very happy I changed. I love the product, but more so I am thrilled with Tech Support. You are knowledgeable, polite, pleasant and professional." - Comment from Pat
"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post
"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
"Thanks for following up with me. You guys do a great job in tech support." - Comment from Phelps
"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
"You are much better than lawyers or the phone company because you answer the phone when I call! I just love your customer service." - Comment from Isreal
"I am enjoying the feed very much - so superior to the broker provided feed I was previously using." - Comment from George
"Awesome response, as usual. It is a sincere and refreshing pleasure to do business with DTN, compared to your competition." - Comment from Ryan
"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
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 »Product Support »DTN.IQ Client Software Support »Best Way to align local machine time and IQFeed server time
Author Topic: Best Way to align local machine time and IQFeed server time (5 messages, Page 1 of 1)

buscq9421
-Interested User-
Posts: 10
Joined: Jan 26, 2019


Posted: Feb 12, 2019 11:00 AM          Msg. 1 of 5
I am trying to calculate the delay from my local_time to IQFeed's server_time.

Right after I receive a Q message whose message content contains "b" or "a", I logging my local_time. The Bid Time or Ask Time in the Q message provides the server_time.

I expect local_time - server_time to be some small positive number, but I notice it's pretty consistently around -0.55 seconds. Hence, I wonder if IQFeed offers some good way for local machine to align to the server time.

Thanks.

quickTick
-Interested User-
Posts: 47
Joined: Nov 17, 2013


Posted: Feb 12, 2019 11:31 AM          Msg. 2 of 5
There are 'T' messages giving you the server time each second. I haven't tried to use them to synch yet, however I would assume they are sent at each full second.

stargrazer
-DTN Guru-
Posts: 292
Joined: Jun 13, 2005

Right Here & Now


Posted: Feb 12, 2019 12:57 PM          Msg. 3 of 5
Do you use NTP to sync the time of your server to the 'rest of the world'?

quickTick
-Interested User-
Posts: 47
Joined: Nov 17, 2013


Posted: Feb 12, 2019 02:26 PM          Msg. 4 of 5
A quick test: the difference between local NTP time and "T" server time indicates "T" time has a small delay in addition to half of ping roundtrip. Symbols from Chicago have another, yet small, delay on top of that, and symbols from New York a bit higher delay. As far as I can tell, nothing strange or unexpected.

stargrazer
-DTN Guru-
Posts: 292
Joined: Jun 13, 2005

Right Here & Now


Posted: Feb 12, 2019 02:33 PM          Msg. 5 of 5
I'm not sure what the question is, because I think the discrepancies can be attributed to mostly physics then.

When I looked at this many moons ago, Chicago was closer then NY to the DTN servers, thus the differences in time.
 

 

Time: Thu May 26, 2022 1:19 PM CFBB v1.2.0 16 ms.
© AderSoftware 2002-2003