Trading at the largest FCM does not benefit you. GS only takes large institutional accounts. Most of the other large brokers are the same. In fact last month I had a conversation with the VP of futures sales of a large broker, and they told me they asked all their "small" accounts to move to another broker. They defined small as under $300,000 a year in commissions. I'd love their small accounts!
I would look for an FCM that focuses on futures and does not do everything. We introduce to INTL FC Stone and I like dealing with them.
My email is below if you would like to discuss your needs directly.
Bob
Thanks, Bob, for your good advice.