tough Platypus_9271 : Most investors know that you can make money on a falling stock and not on a dangerous short sale. Say you bought Tesla at $930 and it drops to$ 900. If you sold it at 920  and bought it back at 900 you would have a loss of $10 and have a gain of $20 when you bought it back at $900. Try not to do these type of trades on the same day unless you have $25,000 in your account or you will get hit as a pattern day trader. But you can still do this once or twice a week, just keep track of you same day trades