Foreign exchange transactions need to pay attention to distinguish between spot transactions and forward transactions. If leveraged margin trading is used, long means lending to the platform, short means integrating with the platform, and overnight trading will generate interest;

At the same time, since the spot foreign exchange rule is T+0 trading, no matter whether you are short or long, as long as you don't stay overnight, there will be no fees except price difference and commission. Therefore, transactions that do not end on the same day will generate overnight fees or inventory fees, which are essentially interest. In a profitable state, the settlement of overnight fees may be positive.