K & ampd value: Calculate the future random value by using the highest price, lowest price and closing price in the period. Its value will be between 0~ 100, and 50 is the watershed of strength. K-line stands for fast moving line, D-line stands for slow moving line, and K-line and D-line cross to show high and low levels, representing selling and buying signals respectively. It is an analytical tool for forecasting short and middle lines.