RSI relative strength index, strength index was first used in futures trading. Later, in many chart technical analysis, it was found that the theory and practice of intensity index were extremely suitable for short-term investment in the stock market, so it was used to measure and analyze the stock price rise and fall. WR William indicator: 1. WR fluctuates from 0 to 100, with 0 at the top and100 at the bottom; 2. The indicator takes 50 as the central axis, and above 50, the stock price is considered to be stronger; Below 50, the stock price is regarded as weakening; 3. After the indicator is higher than 20, it will fall below 20 and be sold again; After falling below 80, break through 80 and buy again; 4.WR hits the top three or four times in a row, and the stock price reverses downward with a high probability; If it bottoms out 3-4 times in a row, the stock price is likely to reverse upwards.