"Selling" means selling, which was called "selling" in the jargon of the past. There is no difference between the closed position and the open position, which may be the closed position or the open position.

For example, someone said, "I think soybeans are going to fall, so I threw ten hands at a high position." This is the starting position.

Or: "As soon as I saw something was wrong and sold more and more orders, I quickly threw away all the orders in my hand." This is a sale and liquidation.