2. The W & ampR William index is an oscillation index, and the improved W&; R indicator trend judgment skills: No.34 W &;; The R indicator line can be used to judge the medium-term trend. When the W &:R indicator runs upward, it indicates that the medium-term trend is improving. On the contrary, when running downward, it shows that the medium-term trend is weak. Only 34 days, W &;; The R indicator suggests that when the market outlook is good, you can participate in short-term operations in an appropriate amount. When the 34th W &;; R indicator and the 89th W &;; R indicators suggest that when the market outlook is improving, you can boldly and actively participate in the short-term.