I'm currently with IB and as I've gradually made higher and consistent profits trading futures instead of equities, I'm thinking it might be time to open an account with a dedicated futures broker to release a lot of my capital currently tied up in IB's margin requirements (for example, IB requires $2,813 initial margin for ES while many futures brokers require only $500). However I don't know what else to look for in a futures broker besides low margins. I currently trade between 500 and 1,000 roundtrips per week, mostly financials and energy, using ZeroLineTrader with IB. From a software perspective I'm not looking for anything fancy although automatic stops and profit targets ala NinjaTrader/ZeroLineTrader would be nice. I understand picking a broker with a good clearing house is important but I don't know exactly what to look for here. Finally, from searching other threads and reviews, it seems like Mirus and Velocity might be good choices based on the above criteria and my current trading needs, are these considered the "gold standard" in futures brokers, and can I skip to the chase and go with one of those since I don't have any unique trading needs? Any advice or recommendations would be appreciated, thanks very much!