The fluctuation range of KD is generally between 0- 100, with 50 as the median, above 50 as the strong area, and below 50 as the weak area.
More than 80 is a super-strong area, which is an overbought area, indicating that the buyer's strength has increased greatly. Most investors are optimistic about this stock, and very few investors are selling it, which is also a high-risk area.
50-80 is divided into strong areas, indicating that the buyer's strength has increased.
20-50 is a weak area, and more than half of the people are selling stocks.
The area below 20 is oversold, that is, more than 80% people are selling stocks, or only more than 20% people are buying stocks, and the stock price is oversold.
Note, however, that KDJ will be passivated in both ultra-high and ultra-low positions, that is, when the stock price rises above 80% of the index, it will rise again. As long as KDJ does not die, it will still fall down again. If you fall below 20, you won't rebound all the way.