Futures trading is a buying and selling activity or process. The unique functions of futures trading, such as hedging, preventing excessive market fluctuations, saving commodity circulation costs and promoting fair competition, are of great significance to the development of China's increasingly active commodity circulation system. China's futures trading has made great progress. However, due to the lack of corresponding legislation, futures trading is in a state of no legal basis, and excessive speculation prevails. It is extremely necessary to strengthen the special legislation of futures trading.

When the computer trading system matches transactions, the basic principle is that price and time are given priority (in some cases, in order to control risks, liquidation orders will be given priority at the same price).