Stock + can provide quotes for stocks traded on a variety of exchanges around the world.
Generally, all you need to do is add the exchange specific identifier to the stock symbol in order for Stock + to track it.
For example, if you would like to add stocks traded on the London Stock Exchange, you would add ".L" to the end of the symbol.
Vodaphone Group trades on the US Markets as "VOD". You can see it's London stock exchange listing by using "VOD.L".
Here is a list of Stock Exchange suffixes: