Is it permissible to trade in Forex through an Islamic account without margin, relying solely on the original capital and maintaining a fixed spread between the buying and selling prices?

The forex system includes several Sharia-related prohibitions, such as overnight fees, the margin system, combining a loan with brokerage, the lack of immediate exchange between currencies, and selling what one does not own. If you avoid the margin and ensure your transactions are free from the aforementioned prohibitions, then it is permissible.