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 like you guys better than *******...much more stable and a whole lot fewer issues." - Comment from Philip
"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 cannot believe what a difference it makes trading with ProphetX!" - Comment from Bruce in Los Angeles
"I "bracket trade" all major news releases and I have not found one lag or glitch with DTN.IQ feed. I am very comfortable with their feed under all typical news conditions (Fed releases, employment numbers, etc)." - Comment from Public Forum
"For anyone considering using DTN.IQ for a data feed, my experience with the quality of data and the tech support has been very positive." - Comment from Public Forum
"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
"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
"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
"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
"Thanks for following up with me. You guys do a great job in tech support." - Comment from Phelps
Home  Search  Register  Login  Blogs Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather
Follow DTN_IQFeed on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
Viewing User Profile for: rbrodt
About Contact
Joined: Oct 23, 2008 10:33 PM
Last Post: Mar 6, 2009 09:07 AM
Last Visit: Mar 6, 2009 01:52 PM
Website:  
Location: Colorado Springs, CO
Occupation: Programmer
Interests: Programming
AIM:
ICQ:
MSN IM: rbrodt@hotmail.
Yahoo IM:
Post Statistics
rbrodt has contributed to 4 posts out of 18938 total posts (0.02%) in 3,773 days (0.00 posts per day).

20 Most recent posts:

Since tick data is typically accessed sequentially (from start to end) instead of randomly (picking out a tick from the middle of at trading session) it makes sense to use a directory and file structure. One directory per trading instrument, and one file per trading session. To conserve space, we use a flyweight design pattern storing only the price and size offsets from an initial absolute price/size. So the tick file uses a "long" record that contains a timestamp, the LAST price and size, and volume, then subsequent ticks use a "short" record that contains a time offset from the previous record (in seconds), price offset (in "ticks" depending on the instrument) and a size offset. If the offsets are too large to fit into a "short" record, we write another "long" record. A day's worth of tick data is typically about 1Mb - small enough to be managed comfortably.


Never mind...I found my answer here:

http://forums.dtn.com/index.cfm?page=topic&topicID=2231

When I ran from the debugger, the app did not find the extra IQ32.DLL in the app install directory and everything was cool. But when I ran the app on production, I guess two instances of the DLL were being loaded.


Hi Steve,

I have already sent an email to support@iqfeed.net, but maybe someone else on this forum is experiencing the same problem...

I am developing a win xp app with ms vc++ 6.0 using the latest iqfeed client 4.5. Everything works fine on my development machine but when I try to run the app on a production machine, I am unable to connect. I am using SetCallbackFunction() then I spin off a separate thread to call RegisterClientApp() so that the main thread doesn't block. The iqfeed API never calls my callback. As I said before, this works in my dev environment but not in production. I have also tried running both the release and debug versions of the app on production and that did not work either. Also tried calling RegisterClientApp() from the main thread, same thing. Any ideas what might be causing this?

Thanks!
Bob

IQFeed Developer Wish List » mktsymbols.txt Oct 23, 2008 10:39 PM (Total replies: 1)

Is it possible to get a security type code along with the list of symbols in mktsymbols.txt ?


Time: Wed February 20, 2019 5:13 PM CFBB v1.2.0 0 ms.
© AderSoftware 2002-2003