here is an example. you have $100k, $50k to short, and $50k to long. both positions now have 10% profit now. Now you have $45k short and $55k long with $10k reinvestable profit. What do you do? Your short/long ration is changed from 10/10 to 9/11. Should you add 5k to short then sell 5k long positions, to make 1/1 ration again? or add $10k to short, and does not change long? or add 5k to short and add 5k to long? Old position: $50k short, $50k long, $0 useable margin Current positoon: $45k short, $55k long, $10k useable margin. What to do?