Is forex trading considered permissible if dealing with the brokerage firm involves no margin borrowing, no overnight fees, and profits are added or losses deducted instantly from the account, with the possibility of transferring profits to a bank account within two working days or more?

The aforementioned transaction with the brokerage firm is permissible. It involves depositing money into an account to buy and sell currencies without borrowing or taking interest. The regulations for currency exchange must be observed, especially the "spot exchange" (taqabud) in the contract session when currencies differ. This can be substituted by a bank entry, with a permissible delay of up to two working days for the amount to be credited, provided that the amount is not disposed of before it is credited. If the Shariah controls are met and the transaction is free from prohibitions, then there is no objection to it.