Because forex exchange is a margin trading system, there is financing leverage by default. If you use leveraged funds when trading, you will be charged an swap fee in the early morning of each day. If your account leverage is 1:100 and the actual account funds are 1,000 USD, then you can buy orders worth 100,000 funds. If your purchase amount exceeds $1,000, then swap fee charges will be charged for the excess amount. The reverse is also true. You can operate a transaction of $1,000 with only $10 in the bureau, and the remaining $990 is paid by the broker for you, and interest fees are also required when the transaction is settled.