Doing what I call an autopsy on each and every losing trade --- dissecting the reasons both technical and fundamental for initiating the trade , my entry and exit execution,and trying to determine where my strategy misfired. I have learned that if I regularly analyze all losers , over time I tend to avoid making the same exact mistake twice, although its certainly not guarenteed .This presumes that one believes in causality ,i.e. that prices are not merely random in nature but rather are a consequence of actions that preceeded them, both fundamental and technical and are a manifestation of such actions.l