Forex is one of the things that is becoming more and more popular among those who want to make solid money in a year or two. And since you can change money yourself and take care of the news and speculation, it can take you a lot of time, people are starting to use software that helps people with forex trading.
There are a lot of online software platforms that match different people, they are made for experts and the others are meant to be used by complete beginners. The important thing or at least a very good thing before going into a forex market is to be familiar with the platform (software) you want to use. Since you are not allowed to make a mistake and lose money, first try a demo version of a platform (if available) or check out the complete system used by your friend. From the experiences of people I know the best platform to start with is Meta Trader 4. People like it because of its ease of use and the available version of the demo platform. Others who have started with the platform called VT Trader say it took them quite a while to get ahead with all the possibilities, but once they figured out how everything stands, they had no problem with it and prefer it over Meta Trader 4.
After all the platform or software you use, it is not as important as the money you can make to change currency. Find the platform that suits you, and good luck.