A very very basic trading step or strategy but i would bet this would be the hardest thing to do when you are already in the middle of the trading where we would always seek or find out which price we would set in since we do know that price is too volatile and anytime it can go over or lower on the price we bought.This simply means we would really need analysis on each move we would made and also most people done the reverse thing which is buy high and sell low.