What is the ruling on trading oil, metals, and currencies via the Internet and brokerage firms (Forex)?

It is permissible to trade in oil and minerals on the stock exchange if the speculator adheres to the Sharia controls. Its conditions differ from those for trading in gold, silver, and paper currencies, which require immediate exchange (qabḍ) and equivalence (tamāthul). As for trading through the Forex system, it contains many prohibitions, but the basic principle is the permissibility of buying and selling if these prohibitions can be avoided, especially concerning usurious items.