In the foreign exchange margin, the spread is not reflected in the price, but in the extension of the position, that is, interest will be deducted from the account at 5 o'clock every day in Beijing time, and vice versa.
In foreign exchange futures, the spread is reflected in the price, and there is no concept of day delay. That is, the forward discount of high-interest currency, the discount degree (at interest rate parity) decreases with time and converges to zero when the contract expires.