Traders life takes a lot of extra patience, extra efforts, extra knowledge, extra care and the courage to take extra risk on every trading a trader will do. If a trader have this all a trader's life is very succesful.
As a skilled trader I think he should have the following requirements:
1, Basic Trading Techniques
2, Know the opportunity and make the right decision
3, Know the target and fund management
4, There are many failures in the transaction and he knows how to redevelop