How Trading Hesitation Works

Have you ever found yourself locating a trading set-up that meets all the rules and criteria of a strategy only to hesitate and then find yourself saying, “Ah! I would have been right!”. To take it a step further, have you then found yourself saying, “That figures! The trade I don’t take is a winner, the trade I do finally make and I lose!” What exactly is going on here? Why does this seem to oftentimes be the case? It can all be explained using some math and probabilities.