Basic order ticket type:

Market order:

Advantages - The market order guarantees that the customer can immediately close the transaction and prevent not to get buy or sell or the stop loss/stop profit as soon as possible.

Limit order:

Advantages - The transaction price range can be locked.  The transaction price is not necessarily the customer-specified price limit, but may be “better”, that is, to buy at a lower price or to sell at a higher price.