For long-term investors, it is better to look at the daily K line than the time-sharing K line. Through the daily K-line, investors can better grasp the trend of futures in the later period. When doing long-term trading according to the daily K-line, investors should reasonably control their positions, and it is best to operate lightly and set a stop loss position, otherwise it is easy to explode. For example, the low position of futures in recent trading days is set to stop loss position, and the recent high position is set to profit position.