I have always traded with 1 system only. I am looking to add another trading system. Sometimes they conflict in direction (thus they cancel each other out). What is the best way to trade multiple systems? Do you set up 2 different accounts with the same broker? Or- if long 10 contracts and your other system says short, do you close the 10 contracts instead? What about margin? If you are technically neutral (2 different accounts but long in one and short in another), but one account shows a profit of lets say $10,000 and the other a loss of $8,000 (does the brokerage house automatically shut off buying power of the negative account? Or do their systems realize you are still in the green in other account? I am using Tradestation as my brokerage.