The most commonly used Order Type is called a Market Order. It’s the most straightforward way of entering into a trade and can usually be done by the clink of a button. With a market order, you are basically telling your platform get me into this trade at the best price available right now, and assuming the market is open and assuming you have enough margin to open the trade, once you click the button a trade is opened.  The order will be executed at the current market price. 

So, once we have selected the volume that we want to trade… If you place a Buy trade, the order is filled at the best available Ask price. And if we want to close this trade we can simply right click it, and close the trade. If you place a sell trade, the order is filled at the best available BID price. And if we want to close the sell trade we can once again simply just right click the order, and close the trade. As a side note, always be mindful of spreads when using market orders, especially if you will be placing trades during news events or low liquidity periods.