How swaps work
Forex positions are rolled over to the next day at the daily cut-off (usually 5pm New York time, which is around midnight in Tanzania). Depending on the pair, direction and the broker's mark-up, you either pay or receive a small amount.
Many brokers charge a triple swap on one weekday (often Wednesday) to cover the weekend.
Swap-free accounts
Some brokers offer swap-free (Islamic) accounts that do not charge or pay overnight interest. They may apply other fees instead, so read the conditions.