You should just try to keep an eye on your risk-reward ratio:
if you risk money by opening a position (the spread on a contract) you should get paid for that. And not just the same amount, but at least 3 times the spread. If you enter positions by flipping a coin and set your stop-losses very tight and let your winners run, you shouldn't have an outcome of 0 profit !
That's why I always use pretty tight stop-losses, but trailing take-profit orders: in that way I cut my losses, let my winners run and lock in my profit at any time of the trade.
