What is the ruling on currency trading (Forex), which involves buying one currency and selling another through a broker (bank), and what is the ruling on the money previously earned from it?

It is permissible to buy and sell currencies for the purpose of trading if possession is taken in the contract session and it is free from fraud and deception, provided that one does not deal with usurious banks, based on the Almighty's saying: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression" (Quran 5:2). Accordingly, it is not permissible to engage in the aforementioned practice due to its connection with usurious banks. It is permissible, however, if it is free from this prohibition. As for the money acquired through this method, it must be disposed of in charitable ways, and one must repent to Allah Almighty. Whatever was spent from it on oneself or one's dependents does not require anything except repentance.