7x FIX applications will require some level of development and subsequent integration work to be updated for the TT Platform FIX API. There are several factors that contribute to the need for changes in our FIX specification when moving from 7x to TT:
TT's FIX specification highlights differences between 7x and TT FIX tags in each FIX tag description. In addition, each FIX message definition includes a summary section on FIX tags deprecated from the 7x spec.
Our highly experienced FIX integration team has developed a series of articles to further jump-start the migration process:
More general questions about TT FIX can be found by viewing the FIX channel in our TT Community site: https://community.tradingtechnologies.com/spaces/18/fix.html.