Release Notes – IQFeed

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IQFeed v6.2.1.29 – 2025/09/30

October 2, 2025 Reading Time: 3 minutes

Changes since the last Release Click on title above to see all the changes in this release.

IQFeed v6.0.0.4 – 2018/06/06

Last Updated on: January 18, 2021 Reading Time: < 1 minute

Fixed bugs causing option chains settings not being used when making requests. Fixed bug allowing S,SET PROTOCOL,4.9 command on the L1 port to set the 5.0 protocol instead of returning an error message. Updated news to show all headlines on launch Installer now registering chart control proplerly. SnapQuote now clears the grid and puts the

IQFeed v6.0.0.1 – 2018/03/27

Last Updated on: January 18, 2021 Reading Time: < 1 minute

Changes that will impact develoment: 6.0 Protocol added to all socket types COM functionality will be maintained for protocols 5.2 and earlier, but will not receive future updates History interval requests using the 6.0 protocol now use the time at the beginning of the interval for their labels as opposed to the end. A parameter