Quote from dereksas:
2. That being the case, the secret to survival and success must not lie in the objective principles and theories you can learn from a book, but rather in the subjective discipline and emotional state of mind that you bring to the trading desk. Indeed, many would argue that if you have the discipline and emotional courage to admit when you are "wrong" (or COULD be wrong) in a trade while only allowing yourself to stay in those trades where you continue to be shown "right", then you would not even have to be right 50% of the time in order to stay ahead of the game. It's that tired old phrase you hear over and over: "cut your loser short and let your winners run." Definitely easier said than done.
3. And then even in those trades where you are shown to be right...in fact, more and more right as the trade goes your way, you could still end up wrong because ANYTHING can happen at ANY time. That retrace against you may look like normal consolidation, but then again, maybe it's just starting slow so that when you turn away for a second it will spike against you turning your winner into a loser. I have a theorem that I call "Derek's Monkey Theory" and it goes like this:
Hypothesis: Exit discipline and money management are more important to trading than TA, tape reading, or execution skill.
Proof: If you had to choose one, would you rather make your own entries and have a monkey manage your exits, or would you rather have the monkey make your entries and manage exits yourself?
Conclusion: When in a position, always assume that a monkey made your entry.