This chart is very useful to see the trends of exchange rate between two countries . Suppose , if want to see the trend between USA and Indian currency , then this chart is very useful . The above graph is showing that USA exchange rate is decreasing from 49.95 $ to 46.03 $ . It means power of Indian currency is increasing fastly. [ Related You can also graphic trend of Advertising Cost link ]
In Ratesfx , you can also watch one years exchange rate in html file and download it in excel file .
You can also create Currency market maps are treemap that make it easy to get information about the state of currency market in one glance. Treemap like visualization shows currencies, organized by continents, size-coded by Gross Domestic Product (GDP), and color-coded to show the appreciation or depreciation of exchange rates against the base currency.