A limit order is one of the most basic order types. It allows the trader to specify a price and amount they would like to buy or sell a certain crypto. 

This option is only on Advanced Trade page. 

Example: If the current market price is 1950 and I want to buy lower than that at 1949, then I would place a limit buy order at 1949. If the market reaches 1949 and a seller’s ask matches with my bid, my limit order will be executed at 1949. If the system doesn't find a counterpart that matches, the order remains open until it finds one or until the trader cancels their order.