'for pm to rise sharply the usd has to drop sharply!'
the price of gold is inversely related to the usd!
it's not rocket science!
it's basic economics!
http://symmetricinfo.org/2011/03/what-is-the-relationship-between-the-us-dollar-and-gold-prices/
http://www.forexkarma.com/Gold-Usd-Correlation.html#.UT_4Ohz-HX4
http://www.lbma.org.uk/assets/Alch6605Oconnor.pdf