I have a new system I want to test out... What is the best way to test it? Isn't there a way to make IB think an account is live where I could get accurate ideas of slippage / commissions. Next step I will go live with very small size but I'd rather try to paper trade the system first if possible. What are the best brokers / programs to paper trade? I have Sierra, Multicharts, IQfeed ---- w/ IB as broker. Thanks!