Need for a Graph Website that can do comparisons and calculations

Hi i was wondering if there is a website or any software that could help me compare the Dollar Index with Commodities such as Gold and Oil and calculate things like correlation and do equity to gold ratios?

It would be nice if there was a free program for this.

Thanks in advance!

Oh By the way i stumbled upon an indicator called Stochastic-Rsi. It claims to be much better than both of them separate.Has anyone tried this??Kind of suspicious, if it was the real deal why those two would be used independently?