The correlation, if any, may remain one of the unknowns in the universe!!
I have added the usd index to this chart.
Also you will see (hopefully) that the (days) is set at 200, instead of dragging the days time line out, put your cursor on the 200 days and while holding down on either mouse button you can drag the days time frame back and forth from Feb of 99 to Dec 08.
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