OP's point with or without reference is still a valid advice. Emotional quotient (EQ) is something that I see is lacking for a lot of traders and investors losing money because without it they can certainly do quick and bad decisions as their decisions are always clouded by their emotions during these kinds of situations. I know trading related books will always discuss purely about technical analysis but they are always leaving out the psychological aspect of trading and this is where traders are mostly vulnerable off. You master TA as well as controlling your emotions then I think you are prepared to accept winnings and losses at the same time.