1, because due to the limitation of calculation principle, after the stock price rises or falls for a period of time, the KDJ indicator will become extremely slow to reflect the stock price. When the stock price continues to rise or falls sharply again, the KDJ indicator may only move slightly, which will provide an unrealistic reference indicator for our trading decision. This also makes the KDJ indicator only suitable for use when the stock price box moves. Once a stock becomes a dark horse or the market is completely bear market, the KDJ indicator will prompt premature escape or premature shovel.

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