Can someone please tell me what the difference is between:

• S,CURRENT UPDATE FIELDNAMES
• S,UPDATE FIELDNAMES

When I specify "S,CURRENT PROTOCOL,6.0" the response includes both of these, one after the other, and the first has less fields listed than the second. I can see that "CURRENT UPDATE FIELDNAMES" maps to a [P] summary message, yet "UPDATE FIELDNAMES" doesn't seem to map to an [F] fundamental message. Does this dual output have anything to do with the fact that I specified "trade-only watch?" Perhaps I'm misunderstanding.

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Lew Payne, Founder
Boise Stock Exchange
Edited by Lewcifer on Dec 1, 2018 at 10:31 AM
Edited by Lewcifer on Dec 1, 2018 at 10:31 AM

<UPDATE FIELDNAMES> reports the full list of fieldnames that are potentially available from IQFeed in response to watch commands (currently about 65 fields).

<CURRENT UPDATE FIELDNAMES> reports those fields that IQFeed currently includes in your watch messages. By default this includes only 16 fields out of the ~65 total fields that are potentially available.

The process for selecting which data fields IQFeed includes in your watch messages is described here: http://www.iqfeed.net/dev/api/docs/DynamicFieldsets.cfm

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Note: I am not a DTN employee; my post reflects my personal opinion and not necessarily DTN's

- Yair
IQML - IQFeed-Matlab connector
https://UndocumentedMatlab.com/IQML
Edited by altmany on Dec 1, 2018 at 10:38 AM
Edited by altmany on Dec 2, 2018 at 06:09 AM

Thank you, altmany. Between your explanation and looking at source examples, I understand.

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Lew Payne, Founder
Boise Stock Exchange