Futures self-trading behavior is a kind of continuous trading or self-trading behavior with itself as the trading object. In other words, because the transaction has no real or real counterparty, the transaction completed through the transaction can not make any contribution to the market to find the price, on the contrary, it sometimes prevents the market from forming a normal and objective price. "In short, the transaction is that both the buyer and the seller are the same person. Sometimes this kind of behavior is actually inevitable. Some traders trade with pending orders. Sometimes the market comes so quickly that it is too late to cancel the order. It is better to sell your own orders directly and sell pending orders. The purpose of this is to control the price risk.