The market quotations at the time of trading are the short price (Sell) and the long price (Buy). Sell price: If you think the market price of the product will fall, you can open a "Sell" position at the current "Short Price"; In addition, if you currently hold a "Long Order" and want to close your position, the closing price will be based on the "Short Price". Long order (Buy): If you think the market price of the product will rise, you can open a "long order" position at the current "long order price"; In addition, if you currently hold a "short order" and want to close the position, the closing price will be based on the "Long Price".