"Holding positions overnight" in foreign exchange transactions means that funds owned or borrowed by investors are delayed overnight and interest is paid overnight. In spot foreign exchange transactions, the position must be delivered after two trading days. If the trader is in 1 sell 1000 USD, the investor must deliver on Wednesday unless the USD position is postponed overnight. At 6: 00 am Beijing time, traders will automatically extend all open positions overnight, so as to transfer the original dollar positions to the next trading day before the expiration.