Swap represents a fee charged for holding a trading position overnight. It is expressed in points or percents and it is directly proportional to the volume of the trading position held. Please note the Swap for Forex pairs and precious metals is being charged 3x on Wednesday, which includes also the weekend swaps. (Swap is charged at Wednesday - Thursday midnight) For other symbols is being charged 3x on Friday. (Swap is charged at Friday - Saturday midnight).