The forex market is a different ball game compared to other types of investment based markets. A lot of newcomers often end up struggling with this style of trading and investment because it is completely done in real-time and is extremely fast-paced. The way many of these trading lines work is that you can invest in a certain currency for a certain point in time, depending on where the trend line for that currency is going. Essentially you make a bet on if you think the amount will increase in a set amount of time, and you take those risks. The line may be on an upward rise when you invest, but it might have fallen by the time your investment period is over. So the major aim then becomes to find a trend and make sure the time frame you have kept for yourself keeps rising until the point at which you are pulling out. As you do not freely choose when to pull out but have to decide that before you begin the investment, it is important to be able to calculate when a payoff might occur, and that is where forex brokers come in to play.
You are very likely to begin losing a lot of money once you start forex trading. The reason for this is that the whole thing does work in a relatively randomized way. With millions of people investing and pulling out every minute, there is a lot of fluctuation. You might make some money, but then you might lose a lot. A forex broker will be able to make sure that you do not fall in to the pitfalls and traps that show up on the graph on a daily basis and actually make you some profits.