Foreign exchange margin is a kind of financial derivatives. It is a financial derivative that invests a certain proportion of funds in the foreign exchange market, trades in various currencies, and conducts value-added transactions hundreds or even hundreds of times in the direction of exchange rate fluctuations, also known as leveraged foreign exchange. Margin foreign exchange came into being in the 1970s. Foreign exchange margin has the characteristics of futures, also known as currency futures. It is a futures contract based on foreign exchange and the first variety of financial futures. Mainly used to avoid foreign exchange risk, that is, exchange rate risk. Foreign exchange margin trading, also known as contract spot foreign exchange trading, margin trading and false trading, refers to that investors and financial companies (banks, dealers or brokers) who specialize in foreign exchange trading sign contracts to buy and sell foreign exchange on behalf of customers, pay a certain percentage (generally not exceeding 10%) of the trading margin, and buy and sell foreign exchange at a certain financing multiple of 654.38 million, hundreds of thousands or even millions of dollars.