Hi ETers, I read that many times but i am wondering is there any math behind this common statement? Let us immagine this situation: You have a risk/reward ratio = 1/1 . profitable trades 55%. What do you think the optimized risk you should take for every trade? On another situation, if you have 99.99% propability that your trades is profitable. What do you think the risk you should take for everytrade,relative to your account?