In the early days of being a rookie, it was often selling at the highest point and taking losses. When there was a big rise, it was sold early because it couldn't hold on. The main reason is a poor mindset. When it falls to a low point, it doesn't dare to buy and hopes for it to go lower. In fact, at this time, you should slowly build a small position based on the overall trend, and when it reaches a high point, you are reluctant to sell because you always think it will rise again. In fact, at this time, you should gradually reduce your position and keep a bottom position. That's why it's always difficult to find the right timing for buying and selling and miss the chance. As the saying goes, buy good companies, as long as you don't buy at high levels, you don't have to worry about it falling, just wait for time!