First of all, we must understand the law of price operation. Whether it is stock, futures or foreign exchange, as long as it is a market with high trading frequency, the law of price operation is the same, but the range of price fluctuation is different. First, make clear the laws that can and cannot be determined in the market, and then establish your own trading system framework according to these laws. According to the laws of the market, the market price always breaks through or rebounds at the pressure level, that is to say, the price is always rising, falling and rising, and the ups and downs alternate to form a trend, and the position where the trend alternates is the pressure level. There are three kinds of trends, rising and sideways falling, all of which are irregular cycles, that is to say, they may fall or sideways after rising, and may rise or fall after sideways. This trend is divided into size levels according to the time period and fluctuation amplitude. Trends coexist. There are small trends in the general trend, which should be subject to the general trend. Small trends have only one chance to change big trends. This opportunity can't be found, and we can only know it when the megatrend is over. Once the trend direction is formed, it is not easy to change. The most important point is that the trend runs in a certain rhythm, which is very important.