Kdj, full name of historical indicators, was founded by Dr. George Ryan of the United States. Its comprehensive momentum concept, strength index and the advantages of moving average are also a common technical analysis tool in European and American securities and futures markets. Kdj is a concept of random fluctuation, which reflects the strength of price trend and band trend and is very sensitive to grasping the short-term market trend.

Second, the calculation formula of three parameters:

Take kdj with a 9-day period as an example, first calculate the "immature random value" of the last 9 days, that is, the rsv value. The calculation formula is as follows: RSVT = (CT- L9)/(H9-L9) *100, where CT-the closing price of the day is L9-the lowest price among the 9 days is h9-9. After getting rsv value, we can get K value and D value: K value is smma of rsv value on the 3rd day, and D value is J line obtained by subtracting twice D value from three times K value of smma value on the 3rd day. The formula is: kt = RSVT/3+2 * kt-1/3dt = kt/3+2 * dt-65438+.