The phenomenon known as a price gap in forex trading is actually a pretty simple concept. The price gap is the empty area, hence the name, that occurs when the opening price of a candlestick is not the same as the close price of the previous candlestick. Despite not that common as in stock trading, gaps do happen in the forex market too, mainly because of the fact that the forex market is closed for retail traders during the weekend but it is still active for operations by the International Bank.