I currently use eSignal, it's very comprehensive and reliable, has all the indicators etc but is a bit expensive, and as Trader says you subscribe to different 'exchanges' which are based on geographic lines. The US and European bourses are on different 'exchanges' which will cost you an extra $25pm on top of everything else.
As Helen says minimising costs is vital, particularly when starting out. I'm thinking of trying IQ charts (but they only update every minute!), certainly cheaper, but of course cost is not the only criteria. As always, check around.
There's also a whole section on software etc under the "Reviews" part, definitely worth a read.