Human nature is greed, when you are able to control that feeling, you have nothing to lose when trading. i have a friend who is not very good at analyzing the market but has a very small percentage of losses when trading, he said that controlling greed is my success key.
That's good for him, he knows how to take profit every time that he's on it. I agree with him that controlling it is one of the factors and having it combined for being good at analyzing will make the best out of it.
Controlling greed and knowing how to read the market will give you the advantage that others are wanting to have. If you lose, that's okay because it happens but it should be not that much.
Controlling greed and emotion is something that cant really be done easily unless if you do have already the experience on this market
but if not or doesnt have enough then these things will greatly affect your trading career which would really result into those bad decisions.
Losing is something that cant be avoided but somewhat can be lessen if you do already have the knowledge and experience.