i can not be considered as a successfull trader but i know a few thing that you need to do to cut your losses.
first you must have your own strategy,and put your position.
after you put your position,do not forget to use stop-loss order.
why ? because it's a tool to help you minimize the loss,insert your target into your stop-loss order and wait for it.
if the price goes down to below your level,the order will be executed.