Transaction type Buying long (bullish) means that you think the current index may rise, and you hope to buy a certain number of contracts at the price you set or the current market price. Selling short (bearish) means that you think the current index may fall, and you hope to sell a certain number of contracts at the price you set or the current market price. ·Order method Limit order: You need to specify the order price and quantity. Limit order