In trading, you can only control the entry, exit and position size. Once you are in a position, price is out of your control. If your trade setup is good, your position is statistically likely to be profitable, but never guaranteed. I personally think our brain sucks shit when dealing with random variables: poker, trading, and gambling. Traders, including myself, hold on to losing positions for too long, not willing to cut loss, not willing to let it go to fight another day.