There are many forms of mental problems, such as the rush to close the position when it begins to make a profit after placing an order, which is thousands of miles away from the stop profit price, but carries it when there is a floating loss, the stop loss does not stop, the stop loss is bigger and bigger, or even the stop loss is cancelled directly, using the whole account as a stop loss, hoping to return to profitability one day, resulting in less profit; or confidence is booming after making a profit. Feel that they are invincible in the world and pursue orders blindly, but after the loss, their confidence is greatly lost, even if there is a trading signal, they do not dare to place an order any more. What is worse is that some people even retaliate trading after the loss. In order to cover the loss with the profit as soon as possible, eventually more and more losses will be made, and more and more losses will be lost. And some people after missing the best entry point, extremely regret, the big hands entered the market hoping to make up for the profits they missed before, and finally the price turned around and lost all over the ground to find teeth. Aiming at the problem of trading psychology, I also studied psychology to study the influence of different mentality on trading behavior. Later, I found that emotion affects my behavior very often. The mentality problem we often talk about is the negative impact on behavior when emotions occur. For example, when we lose money, at the beginning, we may just "Oh, the next effort." when we lose money again, we may feel that there is something wrong with our trading skills or that the market of the day is not suitable to do singles. and after many losses, the fear in my heart is getting bigger and bigger. At this time, our first step should wait for us to calm down and ask ourselves what we are afraid of.