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)




"This is an excellent value, the system is generous (allowing for 500 stocks) and stable (and really is tick-by-tick), and the support is fantastic." - Comment from Shirin via Email
"I have to tell you though that using the IQFeed API is about the easiest and cleanest I have seen for some time." - Comment from Jim
"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
"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
"This beats the pants off CQG, I am definitely switching to the ProphetX 3.0!" - Comment from Stephen
"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
"Everything is working amazing now. I'm already impressed with the true-tick feed of IQFeed and it's ability to support my 480 symbol layout." - Comment from Tyler via Email
"The people at Nirvana have very nice things to say about your company and I can see why! Price and service is a potent combination." - Comment from Ed
"Interactive Brokers tick data was inconsistent, so I have switched to using DTN exclusively. It is great to no longer have to worry about my datafeed all day long." - Comment from Philippe
"After all the anxiety I had with my previous data provider it is a relief not to have to worry about data speed and integrity." - Comment from Eamonn
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 »DTN.IQ Client Software Support »Is there a structured way to find out about symbol changes
Author Topic: Is there a structured way to find out about symbol changes (4 messages, Page 1 of 1)

arnonmoscona
-Interested User-
Posts: 5
Joined: Jun 8, 2010


Posted: May 9, 2011 07:02 PM          Msg. 1 of 4
I am using IQConnect with custom code (in Java). I have a nightly process that backfills data that I missed during the day for whatever reasons. To do this I use the lookup calls to get tick data for symbols on a list I manage.

Occasionally one or more of these symbols would have a symbol change (example - the recent change of WFMI to WFM). At that point my calls start blowing up, returning an error message "Invalid symbol". This happens even if I ask for data in dates prior to the symbol change. Presumably I need to use the new symbol even for days when it did not really exist yet.

I know how to get splits (or at least some of them) via fundamentals messages. Is there any API that would allow me to get symbol change info?

Arnon Moscona

DTN_Steve_S
-DTN Guru-
Posts: 2028
Joined: Nov 21, 2005


Posted: May 10, 2011 09:03 AM          Msg. 2 of 4
Arnon, it sounds like you are correct as to the root of the problem you are experiencing. Unfortunately, we do not currently have symbol change messages available via the feed.

taa_dtn
-DTN Evangelist-
Posts: 114
Joined: May 7, 2004


Posted: May 11, 2011 12:34 PM          Msg. 3 of 4
I'd like to hear how other people are solving this problem.

I automated a check of the symbol guide changes list (it's a long URI; see iqfeed.net/symbolguide under NOTIFIES), but that information is often out-of-date. If it fails to include what I need, I check websites manually. Marketocracy seems to do a good job of tracking changes; I use Google and Yahoo as fallbacks.

I hope someone out there has a better solution!

Allen

arnonmoscona
-Interested User-
Posts: 5
Joined: Jun 8, 2010


Posted: May 16, 2011 05:24 PM          Msg. 4 of 4
Thanks. That's helpful, at least for manual use. Automated parsing of it seems a bit of an overkill for me right now.

Arnon Moscona
 

 

Time: Thu October 19, 2017 2:18 AM CFBB v1.2.0 16 ms.
© AderSoftware 2002-2003