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)




"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
"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
"I just wanted to tell you what a fine job you have been doing. While *******, from what I hear, has been down and out, off and on, IQ feed has held like a champ this week." - Comment from Shirin
"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
"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.
"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post
"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
"I used to have *******, but they are way more money for the same thing. I have had no probs with data from DTN since switching over." - Comment from Public Forum Post
"I've been using IQFeed 4 in a multi-threaded situation for the last week or two on 2600 symbols or so with 100 simultaneous daily charts, and I have had 100% responsiveness." - Comment from Scott
"I would just like to say that IQFeed version 4 is running very well and I am very happy with its performance. I would also like to extend a big thanks for the fast and efficient help that I always receive. My questions and concerns are always addressed promptly. Way to go!" - Comment from Josh in CO.
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 »IQFeed Developer »IQFeed Developer Support »C Today.
Author Topic: C Today. (11 messages, Page 1 of 1)

Craig
-DTN Guru-
Posts: 258
Joined: Apr 16, 2010


Posted: Apr 13, 2020 04:29 PM          Msg. 1 of 11
I don't seem to have received any trades until about 9:45 today.
Oh course, the back-fill looks completely different from what I recorded live.
Was there a problem today?

Craig
-DTN Guru-
Posts: 258
Joined: Apr 16, 2010


Posted: Apr 15, 2020 01:43 PM          Msg. 2 of 11
Is there any point in posting here anymore?

DTN_Gary_Stephen
-DTN Evangelist-
Posts: 104
Joined: Jul 3, 2019


Posted: Apr 15, 2020 02:25 PM          Msg. 3 of 11
Craig,

I apologize for not responding to your message until now. That's my fault.

I'm not aware of any data or system issues that happened on Monday morning. If you can provide some examples of the mismatched data, I can investigate what happened. If you wish, feel free to send it to me directly at the developer support email address.

Sincerely,
Gary Stephen
DTN IQFeed API Support


Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist

Edited by DTN_Steve_S on Apr 15, 2020 at 05:00 PM

Craig
-DTN Guru-
Posts: 258
Joined: Apr 16, 2010


Posted: Apr 15, 2020 03:16 PM          Msg. 4 of 11
Here is a plot of the data I received. As you can see I was getting bid / ask updates, but no trades.
Also the bid / ask was nowhere near the market. I had I few others on the same day similar to this, though I as watching 100s of symbols and 99% of them were fine. I can't rule out error on my end, but it seems odd that I was able to process other symbols with no trouble.

If you need any further details, please ask.
Edited by Craig on Apr 15, 2020 at 03:17 PM



File Attached: C.png (downloaded 127 times)

DTN_Gary_Stephen
-DTN Evangelist-
Posts: 104
Joined: Jul 3, 2019


Posted: Apr 15, 2020 04:18 PM          Msg. 5 of 11
If I'm reading this correctly: Blue is the ask, Red is the bid, and Green is that last, which only starts appearing at 9:45. And C, Citigroup, is the symbol. That chart does vary significantly from the past data that is visible in Time and Sales, which looks pretty normal. There are ticks before 9:45, and the Bid/Ask vary normally. You retrieved this data as it came in via a watch (wC) command, correct? Did you customize the fields at all with an S,SELECT UPDATE FIELDS command?

I'll ask our data team if there were any corrections made to that symbol's data, or problems that morning.

Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist

Craig
-DTN Guru-
Posts: 258
Joined: Apr 16, 2010


Posted: Apr 15, 2020 05:00 PM          Msg. 6 of 11
In order:

1. Blue = Ask, Red = Bid, Green = Last.
2. C = Citigroup.
3. Retrieved data attached.
4. Yes the application sends a 'wC'.
5. Select command = S,SELECT UPDATE FIELDS,Symbol,Last,Bid,Ask,Most Recent Trade Size,Message Contents,Most Recent Trade Market Center,Bid Size,Ask Size



File Attached: C2.png (downloaded 118 times)

DTN_Gary_Stephen
-DTN Evangelist-
Posts: 104
Joined: Jul 3, 2019


Posted: Apr 16, 2020 08:34 AM          Msg. 7 of 11
Craig,

I got a reply from our data team. First, there wasn't any problem with the feed that morning, nor any corrections made to the symbol C. It appears your being data was delayed. The times on your chart appear to be 15 minutes behind what our historical data shows for that morning:

Time Last
9:20:00 $47.98
9:25:00 $47.90
9:30:00 $47.51 (9:45 on your chart)
9:35:00 $46.59 (9:50 on your chart)
9:40:00 $46.27 (9:55 on your chart)
9:45:00 $45.76 (10:00 on your chart)
9:50:00 $45.47
9:55:00 $46.05

The same is true if we look at the Bid and Ask:

Time Bid Ask
9:15:00 $47.43 $47.84 (9:30 on your chart)
9:20:00 $47.62 $47.99 (9:35 on your chart)
9:25:00 $47.71 $47.96 (9:40 on your chart)
9:30:00 $47.50 $47.65 (9:45 on your chart)

It's normal for the Bid/Ask gap to be wider before the market actually opens, because these are all non-regular trades, many of which are for small lots.

So why was this data delayed? First, C is an NYSE symbol. Are you subscribed to live data from the NYSE exchange? If you're not sure, double-click the blue IQConnect logo, and then the "Authorizations" dropdown. "NYSE" will be present if you are. (Keep in mind that if you have more than one IQFeed login, each login can have its own subscriptions.)

If you are subscribed to NYSE, were any other symbols delayed in the same way? There are some known causes data feed can be delayed, but generally they would affect all symbols, not just one. And, the delays wouldn't be quite as regular as this.

Let me know the answers to these two and I can investigate further as needed.

Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist

Craig
-DTN Guru-
Posts: 258
Joined: Apr 16, 2010


Posted: Apr 16, 2020 01:58 PM          Msg. 8 of 11
I checked my subscriptions, I def. have the NYSE subscription.
I'm watching 100s of NYSE with no problems, except on this day.
The problem occurred in a handful of symbols on the day, I can track down the others if this helps?

DTN_Gary_Stephen
-DTN Evangelist-
Posts: 104
Joined: Jul 3, 2019


Posted: Apr 16, 2020 03:24 PM          Msg. 9 of 11
Yes, I would be curious to know what other symbols were affected, to see if there's any pattern to it all.


Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist

Edited by DTN_Gary_Stephen on Apr 17, 2020 at 07:01 AM

Craig
-DTN Guru-
Posts: 258
Joined: Apr 16, 2010


Posted: Apr 16, 2020 03:54 PM          Msg. 10 of 11
On the same morning ED, FOX, O.
All a little frighting actually...I'm obviously going to have to add yet more checking.

DTN_Gary_Stephen
-DTN Evangelist-
Posts: 104
Joined: Jul 3, 2019


Posted: Apr 20, 2020 12:22 PM          Msg. 11 of 11
Unfortunately, there's not really a way for us to know what happened after the fact. However, to help track down the problem, there are a few fields you could add to your request going forward, which will be helpful if it happens again:

One field is called Delay. This tells you if the symbol's data is being delayed, for reasons of not being subscribed to the realtime data. This should always be 0 for your symbols, because you appear to have all the necessary subscriptions. If it isn't, let us know right away.

You can also add the Most Recent Trade time field as well along with the Bid/Ask Time fields. This information will help us determine the exact nature of the delay problem.

Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist
 

 

Time: Sun August 9, 2020 8:31 PM CFBB v1.2.0 0 ms.
© AderSoftware 2002-2003