At The Market
A buy or sell order that must be executed at the best price currently available in the market. These are also called market orders.
What we mean by the definition mentioned above is that “at the market” is the best order to choose if the investors are looking for immediate execution, not for a specific price. In other words, it does not guarantee a specific price.
Suppose that an investor wants to buy a share, and the current best sell price in the market is 50 USD. The buy order gets executed immediately at this price.