You should never allow your emotions take control of your intellect. I think emotions should be kept away when you are trading. If you are very emotional then a quick dump and lose can give you nervous breakdown. When you a solid logic and you are following experienced people you will achieve your target. Just set your mind before starting any trade that you will either win or lose, but both will add to experience. Positive hopes will keep you going.
This is one of the golden rule of traders. We need to manage our emotions because as we can see it really affects all the things in our life and it makes us frustrated and miserable. If we are not in good mood or in stable emotion better not to trade same as to gambling. We need to learn that we can only invest the money that we can afford to lose as well.