margin refers to a certain amount of money paid by investors to the exchange or futures company in order to ensure their performance of contractual obligations in futures trading. The role of margin is to make up for the possible losses of investors in the trading process, and also to control market risks.

the transaction amount refers to the sum of the number of commodities purchased or sold by investors in futures trading multiplied by their corresponding unit prices. The amount of transaction directly affects the profit and loss of investors.

In futures trading, there is a certain relationship between margin and transaction amount. Generally speaking, the higher the margin ratio, the smaller the risk that investors bear, but at the same time, they can also obtain higher leverage effect and thus obtain greater benefits. The transaction amount is inversely proportional to the margin ratio, that is, the higher the margin ratio, the lower the transaction amount.