1, opening cost 472 10*5* margin ratio+your handling fee, closing profit 800 yuan-handling fee;

2. It is the average price of all transactions on that day, which has nothing to do with your profit after liquidation. Leaving an overnight position is based on the settlement price of the day, not your opening price, so the overnight position will affect the margin;

3, you can look at the medium and long term, as long as you close the position before the contract delivery date of this variety.