The liquidation of crude oil means that no matter in which direction investors opened crude oil before, they now get cash back through liquidation. Closing a position is generally the opposite of opening a position. The ultimate goal of closing a position is to get back the cash.

Closing position refers to the behavior of futures investors to buy or sell stock index futures contracts with the same variety, quantity and delivery month, but in the opposite direction, in order to close the stock index futures trading. It can also be understood as: liquidation refers to the trading behavior of traders, and the way of liquidation is to hedge the position direction.