Lack of discipline

A lack of discipline is defined as failing to do what you should do in a given circumstance.  There is probably not a trader alive, successful or otherwise, who has never suffered because of his or her own lack of discipline at some critical moment.  What separates those who make money in the long run from the other 90% is:
• The financial and emotional capabilities to survive a breach in discipline.
• The willingness to learn from mistakes and to never repeat a mistake already made.

The Key To Success In Life: Discipline