Cancel command: cancel the command that has not been executed or closed. If you are willing to correct the order at the market price when canceling it, it is feasible to reissue the next order; However, if you forget to add the cancel instruction, there is a danger that both instructions will be executed and the transaction will be completed. According to the price factor, there are the following orders (1): that is, the order is not the maximum price, but the best price available in the market at that time when the order is delivered to the exchange for trading. It should be noted that when the market turnover is large, the trend is to go up or down all the way, and the number of quotations is quite dense, of course, the following market order is the most effective if you make a new order, because you can do it at the fastest speed; Since it is not liquidation, the main purpose is to make a list. When the market situation turns against you, you are eager to close your position to avoid being caught. At this time, the market order transaction has the greatest hope and the fastest.

We should avoid the current market order in the fragmented market where the prices of traded commodities fluctuate greatly and jump up and down. When placing a market order, it is advisable to choose goods with large transaction volume and high price, because they are not very active and easy to enter the market. Limit order: An order to buy or sell at a specific price. If the limit order is to buy, its set price must be lower than the current market price; When selling, the set price must be higher than the current market price. Stop loss order: that is, after the market price reaches a certain price, the transaction is made at the market price. When purchasing, its specific price must be higher than the current market price; When selling, its specific price must be lower than the current market price. Usually this kind of order is given when the trader has confirmed the contract. In order to prevent the wrong trend from causing too much loss, a stop loss order is given first. In order to reduce losses. Piecemeal order: an order to buy or sell the same commodity contract continuously at different price gaps.