When you investon Forex, you have two main tools under eyes. Your platform of trading, which allows you to cross your orders, and your graphs, which represent the evolution of the prices.
There are several types chaps of graphs, several manners to represent the evolution of the courses prices. The most used method, and the best in our opinion, is the method of the Japanese candlesticks.
With the method of the Japanese candlesticks, the graph is established by a succession of "candles", every "candle" (see this above) representing a period. It can be 1 min, 10 min, one hour... Most of the software are completely customizable.