A trading strategy which involves emotions, yes. A trading strategy which does not involve emotions, no. It depends on how human you are. If your trading strategy means you have to think, or more specifically, decide, then it will generate emotions. If other emotional factors are going on in your life, whilst operating such an emotional trading system then, yes, I agree, such a situation is not a great mix and one will drag down the other whichever way around you look at it. Strategy and emotions are connected, as is everything.