What are the k and d values of futures? thank you

There are three lines on the futures icon, K line D J line.

Some technical schools place orders, according to KD value analysis.

KD line is called random index, K is fast index and D is slow index.

When the K-line breaks through the D-line upward, it indicates an upward trend and can be bought; When the K line breaks through the D line, it can be sold.

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