The second opening is divided into profit leaving, entry after stop loss and entry after stop loss. This kind of situation usually occurs in the breakthrough approach. We say that the trend is composed of price patterns, so you often choose to enter the market again. What you need to confirm is the validity of your position. There are two points: one is the effectiveness of the position, that is to say, if you are long, the position should be effectively supported, and if you are short, the position should be effectively resisted, which has a great influence on the second point. Finding the right entry position involves fund management, in which the setting of profit-loss ratio is very important. If there is a problem with the nature of the position in the first step, it is difficult to set the stop loss and take profit. It's very risky. After entering the market, it is very important and difficult for traders to enter the market again if they make mistakes in judgment and stop losses. Therefore, traders are very afraid of losses at this time, and may have to reverse the operation after reversing the stop loss within the range. The greater the psychological pressure of reverse operation, the greater the possibility of success. Reverse operation is often one of the most robust methods, but it must be at a certain distance from the stop-loss price. However, if the price returns to the range after the stop loss, the compound condition is to open the position in the original direction again. Compared with the last position, the second position is bigger than the first position, but it cannot violate the principle of fund management. The total amount of funds is less than 20%, generally around 10%, and the single loss should be controlled at 5-8%.