That's partly right, but their restricting you on flip trades. If you hold a position already in a few stocks, you can sometimes buy and sell out of that position without them recognizing it as flip trades. Flip isn't the terminology they use, but that's all I could think of. Also, and I think you covered this, you do have to apply for a margin account to do this. With the margin account, you do not have to wait for settlement. It's best for anyone to check with their brokerage firm for all the details.