Oasis in the desert
Being thirsty in the desert, hoping to find some water, when you find you would drink as much as you can, right? That what trading is about when you find a profitable trade, YOU must stay there, but then the market recovers and you have a loss, it was just an oasis.
Lesson : One of the hardest questions..keep the trade open in order to get a huge profit or close it with a smaller profit.