Sometimes, I do think that it takes a good level of emotional maturity to be a top trader. Looking at charts can be emotionally agitating, eventually, sideways movement will give into an upward or downward trajectory.
Of course, it is like that... It's impossible to become an "expert trader" without going through all the bad things and emotional rollercoaster... You can have beginner's luck, but that does not make you a good trader... :)
Beginner's luck can be dangerous, especially if it gets to your head. You start believing that you're good at this, when in reality is that you're just playing in a sunny season.