A tool used in stock market and futures market to judge the market trend. K-line is more likely to swallow Yang, and the market will rise. It's actually quite understandable. For example, three days ago, the Yinxian line was closed, and on the fourth day, a Dayang line covered two Yinxian lines. So it's called one yang swallowing three yin. Simply put, one day's increase exceeds three days' decline. Formula: XG:C & gt；; OANDC & gt=MAX(REF(C， 1)，REF(O， 1))ANDC & gt； =MAX(REF(C，2)，REF(O，2))ANDC & gt； =MAX(REF(C，3)，REF(O，3))ANDO