Average price line refers to the average line of stock prices in a certain period of time. Average price line is an important index in stock analysis, which can reflect the trend and fluctuation of stock price. In the stock K-line chart, the average price lines of different time periods will be drawn, such as the 5-day average price line, 10 daily average price line, and the 20-day average price line. Each average price line represents the average value of stock prices in different time periods, which can help investors better grasp the price trends and fluctuations. The function of the average price line is to smooth the fluctuation of the stock price, so as to better observe the price trend. When the stock price has been fluctuating above the average price line, it shows that the stock price is on the rise; On the contrary, when the stock price has been fluctuating below the average price line, it shows that the stock price is in a downward trend. So the average price line refers to the average line of stock prices in a certain period of time.