Quote Cancelled Message Fields

A Quote Cancelled message will be sent to indicate an unsolicited cancellation of a quote entered with a Quote Update message. An unsolicited cancellation is used, for example, when a resting quote is cancelled due to MTP with an inbound order or quotes are being cancelled due to a risk trip.

Cboe Titanium U.S. Options BOEv3 Specification - Quote Cancelled Message Fields | Cboe