What does FF Option type signify?

Developer API
1

Couldn’t find any direct corelation with any product

2

When subscribing to a feed using the ‘full’ method, it’s indicated by ‘FF’, signifying a full feed. Similarly, if you subscribe using the ‘ltpc’ method, the key values will be altered to ‘ltpc’.

We plan to include this information in the documentation in future releases.

3

so we shouldn’t expect it in the instrument list I guess !! Only used for subscription and market watch updates ? correct ?

4

Yes, correct.

Happy coding!