The Silver/Gold Ratio
This chart is updated every Saturday.
This chart is the price of silver in ounces of gold. During times of turmoil, when both gold and silver are rising, silver tends to outperform gold dramatically. See also the yearly version of this chart which is annotated for wars and other tumultuous events.
Data for the prices of silver and gold comes from the daily London Fix and is available on Kitco's website.