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)




"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
"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
"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 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
"IQFeed version 4 is a real screamer compared to anything else I have seen." - Comment from Tom
"Thanks for following up with me. You guys do a great job in tech support." - Comment from Phelps
"IQ feed works very well, does not have all of the normal interruptions I have grown used to on *******" - Comment from Mark
"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
"Its working FABULOUSLY for me!! Holy cow...there has been so much I've been missing lately, and with this feed and Linnsoft software...I'm in the game now." - Comment from Chris R.
"I had always used ******* but for the past 2 weeks have been trying DTN IQFeed. Customer support has been extraordinary. They call just to make sure your problem hasn't recurred." - Comment from Public Forum
Home  Search  Register  Login  Blogs Recent Posts

Information on Various DTN Products:
DTN IQFeed | DTN ProphetX | DTN Ag | NxCore
Follow DTN_IQFeed on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
»Forums Index »Product Support »Data and Content Support »Day/Time when lists and option chains are updated
Author Topic: Day/Time when lists and option chains are updated (5 messages, Page 1 of 1)

quickTick
-Interested User-
Posts: 35
Joined: Nov 17, 2013


Posted: Nov 6, 2017 05:36 PM          Msg. 1 of 5
I was wondering if there are definite times when you update any changes in lists (such as listed markets) and/or option chains.

For example, if that always happened Friday night, and one would make sure that the app is restarted, or the lists are reloaded, on Saturday, then one could be certain that nothing changes during trading or other times. It would not be necessary to repeatedly reload these lists, saving resources on both client and server.

Thanks for any info on this subject.

quickTick
-Interested User-
Posts: 35
Joined: Nov 17, 2013


Posted: Nov 7, 2017 09:12 AM          Msg. 2 of 5
It looks like both of these messages were meant for a different topic.

DTN_Tim Walter
-DTN Guru-
Posts: 1102
Joined: Apr 25, 2006


Posted: Nov 7, 2017 09:32 AM          Msg. 3 of 5
Thanks, I cleaned those up.

Listed markets, trade conditions, and most lookups are all updated on the fly, but normally updates are pushed out over the weekend.

The chains look like they update every morning by around 5 EST.

Tim

quickTick
-Interested User-
Posts: 35
Joined: Nov 17, 2013


Posted: Nov 7, 2017 11:41 AM          Msg. 4 of 5
Thanks for the info!

So if I load or reload an option chain maybe 1 hour before OPRA market open, there will be no need to check for updates for the rest of the day.

Regarding the listed markets, I did a quick comparison of the current list, and the one you have on your website. It seems the listedMarketID is more stable than the shortname. For example,
ARCA changed to NYSE_ARCA, yet remained at ID 11. And NMS changed to NGM, yet remained at ID 1 (although ID 21 was added).

So does the ID remain the same as long as a listed market exists?

For security types, can we expect that types 1, 2, 6, 8 and 9 will always keep their meaning, even if others are added or removed?
Edited by quickTick on Nov 7, 2017 at 11:42 AM

DTN_Tim Walter
-DTN Guru-
Posts: 1102
Joined: Apr 25, 2006


Posted: Nov 7, 2017 02:05 PM          Msg. 5 of 5
We do recommend loading it each day at startup to be safe, but other than adds and short/long name changes, you should be safe.

Tim
 

 

Time: Tue January 16, 2018 1:37 AM CFBB v1.2.0 16 ms.
© AderSoftware 2002-2003