That sucks! I rarely set sell orders during these short P&Ds unless I need to go to sleep. Otherwise, I prefer to check on its evolution every once in a while and decide when to sell and when to buy back based on what I see. I don't hunt for the top or the bottom. Sometimes I catch them if I am lucky (I caught them both in a previous P&D, but didn't catch either of them this time), but the important thing is to make a profit in the end.