The stock market is represented by companies from all around the world, and trading on the stock market means buying and selling stocks at different international companies like Apple, Tesla, and others. The forex market or foreign exchange market is a global decentralized or over-the-counter market in which those currencies are traded. On the forex market, you are making money on the difference between a currency price. Both of them are cool, but in the forex market, you can make much more money in a shorter period of time.