QuoteTracker

As written on their website: QuoteTracker is a Windows program that integrates with various datafeeds, brokers and financial sites to provide you with streaming real-time quotes, Live intraday charts with Technical Indicators, Level II quotes, Time and Sales, alerts, news monitoring, and everything else you may need to trade in today's market.
It also ties into major brokers to give you full Integrated trading from within the software.

Best of all: it's free.

I just discovered this amazing charting software and I must say I am extremely satisfied with the forex graphs : they are very clear , precise and the traders mind detect immediately any change and can act upon it.