Definitely there are certain personality features which will help you to close out profitable deals and get along with trading successfully . A successful trader is patient and disciplined . He knows when to react and when not to . Apart from this he knows the importance of avoid emotions while trading. I also think that there can not be a specified defined list of features that a successful trader must possess. It will just vary from person to person and how calm he keeps himself when he trades. So, whatever helps you to make a better decision is required for a successful trader.