Sequence Reset

A reset sequence operation is not available for Binary Order Entry. However, a member can send a LoginRequest message with ReplayInstruction set to S (Skip), and NumberOfUnits set to zero. Then, upon receiving a Login Response message from Cboe, the member can use the ClientSequence value in that message as the sequence starting point for sending future messages.

Cboe Titanium U.S. Options BOEv3 Specification - Sequence Reset | Cboe