Ameritrade lets me use any money that is three days past the original buy date.
Example: I buy stock A and sell three days later I can use that money again to buy stock B, then sell whenever I want but not allowed to buy stock C until three days from the stock B buy date.
So if I buy and sell B on same day have to wait three days to buy C. Haven't been in prison yet. LOL
I definitely would be flagged as pattern day trader, but keep cash account. No margin. In order to always have money I try to Use no more than one third of my account on any given day. Ex: If there is $30,000 in my account I can flip $10,000 the first day, $10,000 the second day, and $10,000 the third day. When the fourth day comes around the $10,000 from the first day is available. Messes the whole plan up if I hold something more than three days.
trade
Bet you are more confused than ever now.