iBanFirst gives you access to up to 7+ years of historical foreign exchange rates, as well as historical trends and current resistance and support rates, for all available currency pairs.

The chart can be switched from Chart area to Candlestick to view open, high, low, and close rates for each of the available periods.

You can also switch period from All (most periods shown, with least data granularity) to Hourly (least periods shown, with the highest granularity).