Stocks and currencies are two very different assets, so there are quite a few differences in trading. Firstly, the market hours: you can trade forex 24 hours a day on five days of the week, while stock trading is tied to the opening hours of the exchanges that list them. Secondly, the factors that move the prices are different, too - supply and demand affect both, but other than that, for stocks you have to know about the relevant companies and the sectors, while for currencies, the economy of the countries involved is what's important.