Does anyone know the breakdown on futures pricing at prop firms. I am familiar with equity and equity options cost plus models - commission + execution and exchange/ecn fees, credits/debits are passed through but how does it work on the futures side. What I have seen are Cost plus models with Commission (depending on customer status -member/non member/lease, ECM, etc.) + exchange fees, cost to carry, etc. But do firms charge execution? Or is this what they call a brokerage charge, seat charge, admin fee?