i was reading somewhere about how to take profits...let profits run etc...etc. well truisms and sweeping statements are not for everyone in the markets. according to me the greatest fallacy is in the statement that you will never make it taking small profits and wait for the big ones (many books/authors say that). the decision depends entirely on what your system is all about and what instruments you trade. take for example a call/put writing system...as soon as it moves in your favor, take profits. Why? because after sometime only time value will be left, blocking your margin, and reducing only marginally day by day. u can use your money somewhere better. worst, the underlying volatility can change and your written P or C may become more expensive.
another sweeping statement in the market is that its a zero sum game...if i play with you and win, you will have to lose. not always in options trading. can you give any examples?