Please take a look around, and feel free to .
Sure and even if you don't know their psychologies, you must be calculative. That is one of the things that set that investor-Buffet apart. Sometimes I wonder if he applies emotions to investment. Well, he must when he said "do not test the depth of a river with two legs". Emotions might work but better with skills and experience.I agree with that quote, but it means that you must know the psychology of the other trader also, are they greed or fear, and also if we want to know about this we must see the market trend first and what happening to the market before take an action