Why are swap rates tripled on positions held over Rollover on a Wednesday?

For positions that are open on Wednesday and held overnight, the amount added or subtracted to an account as a result of rolling over a position (swap) is three times the usual amount. Charging 'triple swap' for Wednesday roll-over accounts for the settlement of trades through the weekend, as swap rates are not charged during this period due to the market being closed.

Carrying over the position from Wednesday to Thursday, a triple swap was accrued. This happens as the Forex market is the spot market. It means calculations of all the deals are made on the second working day after a trading operation was done. That is why from Wednesday to Thursday (at 00:00), swaps were accrued for past weekends and Wednesdays.

Note: In order to triple swap is added to your trading account, the position should be open during weekends and up to Thursday.