High means that futures run at a higher price and keep rising. For example, a stock has been around 5 yuan since 1 month, but it has recently risen to 9 yuan, and it has basically stopped rising. Continue to fall after selling. At this time, the selling price is high, that is, high price. The high position is comparative and cannot be generalized.
Empty bill: short-selling transaction bill is called empty bill. Short selling is a common operation mode in stock futures market. It is expected that the stock futures market will have a downward trend. The operator will sell his chips at the market price, and then buy them after the stock futures fall to earn the middle price difference.