It seems you've your eyes already set on the expected profit. This thing doesn't really work out like that, at least most times it doesn't. Set your mind on learning the techniques involved in trading before counting chicks that haven't been hatched. Trading is very lucrative once you acquire the set skills and this I encourage you to do. Besides, there is always that caveat at the bottom of trading sites and exchanges alerting you of the risky nature of trading. You can easily lose your capital too just the same way you can double it.