As shown in the figure, the bottom line is the kdj three-line

KDJ indicator, also known as stochastic indicator, is a quite novel and practical technical analysis indicator. It was first used for the analysis of futures market, and then widely used for the short-term trend analysis of stock market. It is the most commonly used technical analysis tool in futures and stock markets.

stochastic indicator KDJ is generally a statistical system used for stock analysis. According to statistical principles, the immature random value RSV of the last calculation period is calculated through the highest price, lowest price and closing price of the last calculation period in a specific period (usually 9 days, 9 weeks, etc.) and the proportional relationship among them, and then the K value, D value and J value are calculated according to smma's method, and the stock trend is judged by drawing a graph.