Market Order/Market Buy/ Market Sell

Market order pertains to the request that an investor had made through either a broker or a brokerage firm to purchase or sell a security at the most desirable price within the current market. It is seen as the fastest and the most trustworthy way of getting trades and getting out of such with ease. As this is the case, Market Orders are fit for securities traded in high volumes. 

Market Orders are filed almost at an instant with a great number of large capitalization liquid stocks. 

Market Orders are considered the most basic among all orders. Its execution should be done speedily with consideration given to the present asking price of a security. For this reason, a number of brokerages include buy and sell buttons in trading applications.