so i have a small account that i'm investing in for the long term. this is not a margin account. i sold cat to exit on friday and now it says the trade settles on the 21st. can i open a new position now as long as i don't close it before the 21st? or do i have to wait until that trade settles before i can use the cash in the account? a few years ago i violated whatever this rule is a bunch (since i'm used to trading in a different futures account where none of that matters) and was just wondering if anyone could help me out by clarifying this rule for me.