Gotcha, i forgot to read the last part of his post, lol.
Yes, Scottrade has a 3 day trading rule, but technically you dont have to wait 3 days to buy, you have to wait 3 days to sell.
For example i buy XYZ with all my money in the account ( dont ever do this, for example only) on Monday, then sell the same day. I can then buy something again today, tomorrow or wednsday, as long as i hold it till Thursday ( the 3rd day) i can then sell what i bought with the unsettled money. If you sell before the 3 days is up you will get a bunch of warnings. Ive gotten away with it many times, but i dont advise of it.