Swap is the term used to show the interest that is received or paid for keeping a trade open overnight.
Swap rates come from the interest rates of the central banks of the two currencies that you are trading with.
Swap short is when a short position (Sell) is kept open overnight.
Swap Long is when a long position (Buy) is kept open overnight.
1. Swap Long: One Point x Trade Size x Swap Long in Points
2. Swap Short: One Point x Trade Size x Swap Short in Points
Below, you may find an example to show how this calculation works. It will show how you can make a loss or earn a profit through swaps.
0.01 x 100 x 1.24 = 2.53 USD
This means that you would receive $2.5272 in swap fees for keeping 1 lot short of XAUUSD past the end of day (5 pm EST).
0.00001 x 100,000 x -4.98 = -4.98 USD
This means you would pay $4.98 in swaps for keeping 1 lot short of USDCAD past the end of day (5 pm EST).
If you are unsure of what the figures in the above equations are, or where they can be found, here is a short explanation of each:
One Point = 0.00001 in EURUSD is the last digit in the price
Trade Size = Lots * Contract Size = 100,000
Swap Long in Points = -4.98 on a Long position on USDCAD
Something to note is that with pairs that close on weekends, there will be a triple swap charged. This is charged on a certain day, usually a Wednesday but in some cases can be another day, to make up for the 2 days that the market is closed.
You can check the swap values, contract sizes, swap long, swap short, and triple swap days for different instruments in the Symbol Properties window on the mobile app. On the desktop app right-click on a symbol in the Market Watch window and select Specification.