In a bull market cycle, the first five bands are bullish and the last three bands are bearish; Among the first five bands, the first, third and fifth, that is, odd-numbered serial numbers rise, while the second, fourth and sixth bands, that is, even-numbered serial numbers of six bands in even-numbered bands are obviously bearish; The seventh odd serial number is rebound finishing. Therefore, odd-numbered bands are basically bullish or rebounding to varying degrees, while even-numbered bands are bearish or falling, and the whole cycle presents a general law of ups and downs. In a longer time, the first five bands of a period constitute the first band of a big period, and the last three bands constitute the second band of a big period. The whole period also consists of eight bands.