Gold $1600 looks vulnerable

I am a bigger believer in sell low, buy lower, than I am in support and resistance.
Golds reversal on Friday was accompanied by a rally in metals and commodities, meaning the US dollar weakness was in play rather than a new demand for commodities or precious metals.
If we get a renewed strength in the greenback the price of Gold will tumble. What else has changed that would justify such a move in the yellow metal?