A successful doesn't just have a good market judgment but also has a good healthy practice. And over-trading is not a practice by them, it is just for those who are chasing their losses thinking that it could help to recover but not knowing this could also be the reason for incurring more losses.
I have noticed that over trading is the main characteristics of newbie traders and that is because of anxiety, greed, lack of self discipline. These factors will make such a trader to lose his emotion to control his trade. In fact, a new trader barely understand what is happening in the market and only what to chase every candlesticks like his mentor has mentioned candlesticks to him. Successful traders are those who have lost their money over the years and probably learn their mistake that they make and now get better with such experience. I believe a trader who is new and making profit is not yet successful until you have been experienced because at the time the profit is coming, it may be you are on the right trend but if the trend change, that comes the real trade challenge. Patience is important to be a successful trader.