BizFOREX interest rates are calculated on the account balances, and it is charged on the currency pairs currently held in customer positions. Moreover, BizFOREX calculates interest rates charged over-nightly after NY market close.
BizFOREX interest charging is performed daily at 4pm EST. Hence, interest on the account balance is credited/charged after 4pm EST each day, with an appropriate entry in the transaction table of each account.