Limit order

MetaTrader 5's Buy Limit asks to buy at an Ask equal to or lower than the order price, with the current price above that level. A Sell Limit asks to sell at a Bid equal to or higher than the order price, with the current price below it. CME's definition is the exchange version of the same idea: a buy limit may trade at or below its price, a sell limit at or above, and the remainder rests until it is executed, cancelled or expires. In MetaTrader's exchange-execution mode a limit submitted on the wrong side of the market can trigger at once and then behave as a limit, so the fill should be no worse than the stated price. A limit order can fail to fill if the market never trades through it.