For everyday traders it becomes increasingly difficult to follow your trading plan if after first big loss you become depressed and as a result change your strategy. There can also be a tendency to be too excited after making a big profit with the consequence that in future trades you will risk too much.
So just like a psychopath, you should be calm and follow your plan regardless of any of your short term results.
You “Can” Control Your Emotions and Win
Of course achieving this state of mind is not easy and if you approach trading with the same attitude as most people then you will likely take care if you lose your money or win. However, being normal is not a way to be a winning trader and you may have doubts that you can achieve the needed state of mind. I also doubted my ability but I persevered and know from my own experience that it is possible to become successful.