Quote from rayl:
Actually, in options, you are not allowed to cross orders and print them to the tape. In options, all orders must be quoted and executed on an exchange. i.e., even if TH sees your order and wants to take the other side of it, it cannot. It must send your order to an exchange -- admittedly since it has knowledge of your order, it can simultaneously send a matching contra order to the same exchange -- but if there's a better inside contra quote on the exchange, that better quote will get it, or, if there's an equivalent customer quote on the exchange and TH is a MM, the customer quote wins.
This is a major difference between the mechanics of options vs equities. With equities, you can negotiate a transaction and print it to the tape. With options, this is not permitted. Of course, I'm referring to exchange listed options and not OTC.