There is no need to hold positions before the delivery date. If you open your position now, you can close your position in the next second, unlike stocks that have to wait for a day. The delivery date of stock index futures is the fifth week of the contract month. He will not leave the market until the delivery date. Even if you don't want to close your position, the exchange is flat.

3 182 is empty, and 3 179 is empty; You made a profit, no position. Unless you booked it wrong.

In which contract to open a position, you need to close the corresponding contract. Make sure you are trading the same contract, that is, IF 1 105.

I really can't figure it out. IF 1 105, IF 1 106 and IF 1 12 are three stocks in the same sector, but this one is only allowed to be short.