In foreign exchange trading, you usually have to pay a certain amount of interest for your positions in the market, and the interest is charged by the day. The calculation formula is as follows: direct quotation (yen, Swiss franc and Canadian dollar): interest = 1/ exchange rate x contract unit x interest rate /360 x days Indirect pricing method (euro, pound and Australian dollar): interest = exchange rate x contract unit x interest rate /365 x days. However, it should be noted that the interest rates of all traders are set by themselves, so there is a big difference, and investors are often opening accounts.