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»Forums Index »IQFeed Developer »IQFeed Developer Support »Undocumented limit of 4000 headlines?
Author Topic: Undocumented limit of 4000 headlines? (4 messages, Page 1 of 1)

altmany
-Interested User-
Posts: 45
Joined: Jul 30, 2018

IQML - IQFeed-MATLAB connector


Posted: Mar 6, 2020 05:01 AM          Msg. 1 of 4
In the following headlines query, I consistently get only 4000 headlines although I requested 5000. Is 4000 an undocumented limit?
NHL,,:,t,5000,,


Yair Altman
IQML - IQFeed-MATLAB connector
https://UndocumentedMatlab.com/IQML

I am not a DTN employee; my post reflects my personal opinion

DTN_Gary_Stephen
-Interested User-
Posts: 52
Joined: Jul 3, 2019


Posted: Mar 10, 2020 01:55 PM          Msg. 2 of 4
Yair,

That's actually not an expected behavior. I've opened an internal investigation on this. I will update this thread when I have findings.

Sincerely,
Gary Stephen
DTN IQFeed API Support

Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist

DTN_Gary_Stephen
-Interested User-
Posts: 52
Joined: Jul 3, 2019


Posted: Mar 11, 2020 01:17 PM          Msg. 3 of 4
As it turns out: yes, this was an undocumented limit, but I will document it here.

Limit is an optional parameter in an NHL request:

NHL,[Sources],[Symbols],[XML/Text],[Limit],[Date],[RequestID]

Your command above specified a limit of 5000 headlines. Here are the limits:
  • If your request doesn't specify a Limit, the limit will be 1000.

  • If you specify a Limit between 1000 and 4000, that will be the limit.

  • If you specify a Limit greater than 4000, the limit is 4000.

So the API actually imposes two different maximums on the number of headlines you can retrieve: 1,000 if you don't specify a Limit, and 4,000 if you do. You may also specify a limit between 1,000 and 4,000.

I hope this clarifies the behavior of the news API.


Sincerely,
Gary Stephen
DTN IQFeed Implementation Support Specialist

Edited by DTN_Gary_Stephen on Mar 11, 2020 at 01:17 PM

altmany
-Interested User-
Posts: 45
Joined: Jul 30, 2018

IQML - IQFeed-MATLAB connector


Posted: Mar 11, 2020 02:08 PM          Msg. 4 of 4
Thank you for the clarification Gary.

You may wish to consider updating the official API doc page accordingly: http://www.iqfeed.net/dev/api/docs/NewsLookupviaTCPIP.cfm

Yair Altman
IQML - IQFeed-MATLAB connector
https://UndocumentedMatlab.com/IQML

I am not a DTN employee; my post reflects my personal opinion
 

 

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