I think that's one of the Stages of a Trader, no?
(While everyone sweats over my favorite trader porn chart, I'm going for a run...)
Note here that while she uses candles and colors and indicators and patterns, I don't. But we go through the same process and end up at more or less the same place. Thus one needn't follow a regimented one-size-fits-all system in order to achieve success. But he does have to set aside ego and, for want of a better word, stubbornness. If nothing else, he has to be able to answer the question, every morning, who's in charge? If he has no idea, then he shouldn't trade that day.