Probability matters more than the strategy itself

One thing I’ve come to understand about trading is that a profitable strategy doesn’t make money because every trade is a good trade. It makes money because, over a large enough sample, the probabilities are in your favor. If your system has a genuine positive expectancy, then taking more valid opportunities allows that statistical edge to play out more often. This is why I think traders sometimes focus too much on finding the “perfect strategy” and not enough on understanding probability, position sizing, risk management and sample size.