Is it permissible to work in Islamic Forex, which is free of leverage, overnight fees, and forms of usury, and which relies on buying and selling currencies using the Contracts for Difference (CFD) system, and profiting from price fluctuations solely with the trader's own money?

Currency trading in Forex is permissible if one avoids sharia-prohibited elements, such as not using leverage, dealing only with one's own money, the absence of overnight fees (swap), and the presence of actual currency trading with immediate, physical possession (qabd shar'i). As for Contracts for Difference (CFDs), which refer to options or futures contracts, they are not permissible under Islamic law due to the presence of gharar (excessive uncertainty) and maysir (gambling), as the underlying asset is neither a tangible asset nor a usufruct. However, if the intent behind CFDs is to profit from the price difference between buying and selling in a real trading operation, then there is no harm in it. Nevertheless, the prohibition of Forex trading is often due to its inclusion of impermissible elements.