Answer: KD indicator: the full name of KDJ indicator, which is called stochastic volatility index in Chinese and Stochastics oscillator in English, is a technical analysis indicator. It originated in the futures market and developed on the basis of WMS.

Extension:

The Chinese name of KDJ indicator is stochastics, which originated from the futures market. Stochastic indicator (KD) was founded by American master Dr. George C. Lane in 1950s. Half a century later, it proved to be an awe-inspiring classic.

Stochastics (KD) is suitable for technical analysis of short and medium-term stocks. Compared with the moving average, the random concept of KD line has its own advantages. Traditionally, the moving average is only calculated by the closing price, so it can't show the real fluctuation of a market. In other words, the highest and lowest prices of the day or in recent days cannot be reflected in the moving average.

Therefore, some experts have gradually created some more advanced technical theories and fully played the role of the moving average. The KD line is one of the representative works.

Baidu encyclopedia -KD index