Market orders are orders that traders execute directly at the best market price.
For example, if you want to buy EUR/USD and the current market price is 1.1730, your order will naturally be executed at 1.1730.
If THE MARKET PRICE HAS CHANGED TO 1.1732 AT THE moment of PLACING the ORDER, YOUR order will be executed at the new market price of 1.1732.
To EXECUTE a market order, select a market order from the list of order types in Order to trade at the current market price.