This question is highly discussed in trading community. Personally I believe that every loss should be examined and a trader should find the reasons for the loss to take place. The reasons can be different.
Sometimes there are such situations when the traders do everything right, but the market was influenced by some economic event and it went in the totally unpredictable direction. In this case a trader should put up with it and go further doing what they need to do.
Another question is the loss caused by the mistakes. In such a situation a trader should find out the exact pitfall in their trading strategy and eliminate that. For this purpose many traders, including me, have a trading diary whn we write all our thoughts which precede making deals. In this case it becomes possible to analyze your decision making process and find out which place and which action should be modified in order to make your trading results better. The very danger of leaving all the losses unnoticed is about the fact that such losses will repeat in the future and their amount will grow.
So, a trader should always be ready to modify their trading strategy and the losses are the right indicators which show that something goes wrong or they may be just another representation of the market's unpredictability.
Sometimes there are such situations when the traders do everything right, but the market was influenced by some economic event and it went in the totally unpredictable direction. In this case a trader should put up with it and go further doing what they need to do.
Another question is the loss caused by the mistakes. In such a situation a trader should find out the exact pitfall in their trading strategy and eliminate that. For this purpose many traders, including me, have a trading diary whn we write all our thoughts which precede making deals. In this case it becomes possible to analyze your decision making process and find out which place and which action should be modified in order to make your trading results better. The very danger of leaving all the losses unnoticed is about the fact that such losses will repeat in the future and their amount will grow.
So, a trader should always be ready to modify their trading strategy and the losses are the right indicators which show that something goes wrong or they may be just another representation of the market's unpredictability.