A trader or a successful trader needs to be educated. educated well because without any good education you will lack the knowledge you need when you ate trading.
There is not such a rule. Trading is a market game with the most skilful and sharp the most advantageous. Many uneducated people have built their empires and many PhD degree holders work for others throughout their lives. A market man can be a best trader. Having some part of your life spent in understanding the market, you really would know which move to make keeping in mind the market behavior in the mind in the same time. This makes to great traders.