They will also give money if the futures are not closed. As long as the variety of positions you hold rises, the margin will increase. Selling futures is not necessarily liquidation, you can tell for yourself. You buy first, then open more positions. When you sell, if you want to close your position, you choose to increase your position. Otherwise, you can also open an empty position. Then you hold two futures at the same time, one is long and the other is short.

The whole process of futures trading can be summarized as opening positions, holding positions, closing positions or physical delivery. Opening a position, also known as opening a position, refers to the new purchase or sale of a certain number of futures contracts by traders. An open contract after opening a position is called an open contract or an open contract, also known as a position. Before the end of the last trading day, choose the right time to sell the bought futures contract or buy back the sold futures contract, that is, write off the original futures contract through a futures transaction with the same amount and opposite direction, thus ending the futures transaction and relieving the obligation of physical delivery at maturity. This behavior of buying back a sold contract or selling a bought contract is called liquidation.