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 ran your IQFeed DDE vs. my broker vs. a level II window for some slow-moving options. I would see the level II quote change, then your feed update instantaneously. My broker's DDE, however, would take as much as 30 seconds to update. I am not chasing milliseconds, but half a minute is unacceptable." - Comment from Rob
"I'm very glad I switched to IQFeed. It's working perfectly with no lag, even during fast market conditions." - Comment from Andy via Email
"I noticed that ******* quotes locked up shortly after the interest rate announcement yesterday while yours stayed stable." - Comment from Ron in Utah
"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
"Very impressed with the quality of your feed - ******* is a real donkey in comparison." - Comment from A.C. via Email
"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
"Previously I was using *******. IQFeed is WAY more economical, and for my charting needs is just as good, if not better." - Comment from Public Forum Post
"It’s so nice to be working with real professionals!" - Comment from Len
"My broker in Davenport suggested I give you a try as he uses your service and says its the best." - Comment from Bill via RT Chat
"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.
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
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 21185 total posts (0.02%) in 5,664 days (0.00 posts per day).

20 Most recent posts:
IQFeed 3rd Party Software Support » What is the best method to maintain a database of ticks for a collection of stocks? Mar 6, 2009 09:07 AM (Total replies: 1)

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.

IQFeed Developer Support » Not getting connection callback after call to RegisterClientApp Mar 6, 2009 08:56 AM (Total replies: 1)

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.

IQFeed Developer Support » Not getting connection callback after call to RegisterClientApp Mar 6, 2009 07:31 AM (Total replies: 1)

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: Thu April 25, 2024 1:58 AM CFBB v1.2.0 8 ms.
© AderSoftware 2002-2003