You have a lot of people who have small cash positions in daytrader margin rules. I know a ton of them all over I hub. When they sell they have to wait 3 days to get their funds available to invest. That is why Friday anyone who sold in the position IMO will end up chasing huge next Wed when they can rebuy back.
My RBC does the same. cant take money out for 3 days, but i can use the cash without waiting for settlement date as many times as i want. I can buy and sell all day with the same cash. I guess thats one good thing except for the $29.95 min fee. After 30 trades in 3 months it will be $9.95, im almost there.
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