Limit is to place an order at the price you want. If your psychological price is far from the market price, your order will hang there waiting for the transaction; The market price is to place an order according to the current market price. Immediately after placing an order, the transaction will be made by buying one or selling one. Futures Daren.com has a more detailed futures trading platform. If the market price changes when you place an order, then you can make a deal according to the changed market price.