Titan makes a great point...you want TADF in non-margin as most sit at home brokerages (TD, Scottrade, etc.) cannot compete with some of the shorts technology (they can trade at tenths of a penny in a matter of nanoseconds). The best way to level this playing field is to make sure you're not buying on margin...forces those shorters into a smaller pool and in a way reduces their ability to game the stock to make a quick buck.