I am trying to pick a future broker, preferably self-clearing. My expected volume per day is around 70 - 100. Most of the time, I trade WTI, Nat gas, RBOB, HO, Gold, and Wheat. Please compare the cost of trade (all fees, commission, clearing, NFA, Exchange fee ...), intraday/overnight margin, interest on margin deposits and average slippages. Thank you for your time.