Generally speaking, the opening and closing fee is six ten thousandths, the spread fee is six points, and the interest rate, that is, the overnight fee, is one ten thousandth.
Opening fee = opening price x specifications x six ten thousandths x lots.
Transaction fee = closing price x specification x six ten thousandths x lots.
Price difference fee = price difference 6X specifications x lots.
Interest rate = market transaction price x specifications x ten thousandths x lots.