Is there a difference between buying 500 shares twice or having a 1000 share order filled by 2 partials. If I have a 1000 share order partialed 5x at 200 sh each, am I PDT if I sell in the same day? My guess is if you bought 2x and sold only once, it would be 1 trade. If it's not 1 trade, then partials could be a problem. But it's only a guess.