Green is active selling, red is active buying. Green active selling volume constitutes the internal market, and red active buying volume constitutes the external market. If the external market is greater than the internal market, it means that the buying orders are stronger than the selling orders, which is bullish; if the internal market is greater than the external market, it means that the selling orders are stronger than the buying orders, which is a bearish trend. This is roughly the case, but of course it is not absolute. It is impossible to judge the rise and fall so simply.