It`s good idea, only thing you need to have is perfect timing to get out and get in again when price drops. It works sometimes, sometimes not, what is important is to have some back up, in case price moves in other direction. Trading is all about timing, perfect trade is when you buy or sell in the right time (perfect buy is before price rise, perfect sell is just before price drop). It`s all about risking too, you don`t catch that right time all the time, you make mistakes that costs, that`s learning, think of it like paying for knowledge.