They can only see the ID after the trade executes, for settlement. It's not broadcast as part of real time trading data, other than 'anonymous,' at most. Keen players might recognize you if they see repeat size and patterns, but even if they back away, many others will take your trade. If...
I'm new to options trading, and was wondering if anyone knows where I can find physical settlement/exercise volume - rather than standard contract volume - for equity options? Thanks :)