Man Cang margin, the user's position margin will change with the price change. All positions in the account * * * use margin, and the profits and losses of different positions can offset each other. Suitable for users with traditional commodity/financial futures experience and arbitrage/hedging users. The deposit of each warehouse should be determined according to the deposit required when opening the warehouse. In the warehouse-by-warehouse mode, the risk, margin and profit and loss of each position are accounted for separately, and the realized profit and loss of each contract can only be used for the opening of the contract, so the margin of different contracts may be different.