Of course, in such long term trading then yes you make a valid point. However, in shorter term time frames such as in intraday trading that makes little logical sense because of mean reversion... whipsawing ...etc. Best to take profits and enter again if the move resumes. 12 points intraday is a good move for intraday. No if ands or buts about it. I get the market giving me 12 points or 14 points intraday on a big spike I am gonna lock that profit in and simply enter again if the move continues. Comm are minimal.