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
Release Notes
IQFeed v6.1 – 2019/09/04
New Market Summary File Lookup! (more about this below) Level1 update/summary messages now include the Trade Aggressor (limited exchanges) and Trade Day Code (all exchanges) fields. Level1 fundamental messages now include Base Currency, Contract Size, Contract Months, Minimum Tick Size, First Delivery Date, Open Time, Close Time, FIGI, and Security Subtype. Historical Tick data requests also now include Trade Aggressor and Day Code. There is now an visual alert