Ichimoku
Once you have downloaded metatrader you should open some currencies charts (by default 4 charts are open).
In the left you will have some indicators you can attach to the chart. You can choose a simple moving average, or more complex indicators like Ichimoku.
Ichimoku is a very powerfull and known japanese indicator.
http://www.forex-tsd.com/general-discussion/157-ichimoku.html
This indicator is based on the 4 time intervals and because of that we may see the 5 different line:
- Tenkan-sen is the average value of the price for the first time interval calculated as sum of maximum and minimum for this period of time devided by 2;
- Kijun-sen is the average value of the price for the second time interval;
- Senkou Span A is the middle of interval between two above mentioned lines (Tenkan-sen and Kijun-sen) shifted onward on the value of the second time interval;
- Senkou Span B is the average value of the price for the third time interval shifted onward on the value of the second time interval;
- Chinkou Span is the closing price of the current candle shifted back on the value of the second time interval.
I will go in more details of this indicator later (this week).
Best regards.
Metatrader Brokers
Forex is one of the most addictive and funny games in internet. And … it can make you rich 
There is no need to risk money, because you can learn using ‘demo’ accounts (without money), and go with real money when you are sure you are really an expert.
Most people use metatrader plattform to trade. It’s fully integrated with a lot of brokers, and have very good chart and scripting features.
It’s free because expenses are payed by brokers. And it’s the currently the best forex plattform.
Go here to get a full list of metatrader brokers: