FX = Foreign Exchange here. Not obvious from the context; for all I know "FX market" could refer to wage-fixing collusion in the special effects industry (with the "chat room traders" trading hiring rates).
I really doubt anyone here is going to assume that the initials FX in a phrase with the words "market" and "traders" could mean anything other than foreign exchange.
Actively assume it means "Special Effects"? Probably not.
Be confused and wish the title was clearer? Much more likely.