I think the most important thing to become a trader is to control your emotions. Many new traders often let their emotions overwhelm and they often make the wrong decisions. If you have negative thoughts while trading, it is best to stop and resolve those emotions before returning to your trade.
This is the most importanf thing for me, because with this it can change everything, we can win or we can lose, a proper mindset is needed for us to make a right choice in everything. Trading and gambling needed a healthy mind so that we cannot lose our money just because of our emotional capability. This must be considered.
Controlling our own emotions and feelings are what we need. Even if if we are good in fundamental and technical analysis but we are luck in controlling our own emotions, we will still fail. In order for us to successfuly execute our trades then we should focus on improving our trading psychology. It is one of the most important thing that we should improve.