Discipline villas. That is the key. And I will tell you that every trader lacks it, wants more of it, wakes up everyday with the intent to trade by it, blows out accounts for lack of it, etc.
But every time you look at the chart you see what has passed you by and you want it. You see that high or low and you envision your pair revisiting the past support or resistance. That uncanny ability of the human mind to comprehend a paragraph with the first and last letters of every word changed is the undoing of us all because we interpret.
I think there are only two candles you need to look at, the one now and the one before.