Here is the GC/PL Weekly Ratio chart. They do chart nicely showing support and resistance areas. Keep in mind Platinum is only used 40% for jewelry. Another roughly 40% is used for catalytic converters in the auto industry and the rest is used industrially. With the auto industry world wide taking off like a rocket that is helping PL run up. Plus some problems with S.African mines that much of PL comes from and you've got a bull market in PL. So PL is not just a precious metal. Since April/09 the ratio has been choppy with little direction other than short bursts up and down. The seasonal trend charts show Platinum has its strongest uptrend from the end of Dec into mid April while Gold has its strongest period in Sept and again from Nov into early Feb.