This advance Plugin allows you to set/switch/ current currency on the fly according to the plugin's rules and a visitor's country. Your customers also convert quickly the specific currencies on front end. The most important is to enable all currencies which you plan to use on the shop settings page. It's possible to use several countries for one currency, your customers from many countries will see prices for your products in one currency such as: your store is selling online in German, all of them from German can see price of your products in EUR, even your customers from France, Austria, and Italy they can see price in EUR as well.
Especially, you can totally set up the plugin to switch the current currency according to the plugin's rules and a visitor's country. One more great for this plug in, you easily create multiple rules for currency so that your customers conveniently see prices in their currency and try to use different countries IP.