The lightening of futures high points is the lightening of long positions. The decrease of futures positions means the decrease of funds in the market, which leads to the decrease of holders and the increase of positions in the market, but the amount of funds sold has not decreased. The reason for the decrease of short positions in the market is that the main funds are optimistic about the later market and sell in large quantities, which is the so-called long-term lightening. In another case, the trading volume of some futures contracts will be significantly reduced, that is, it will continue to decrease in the later period, and the positions will be reduced.