This is an interesting chart I found on FXstreet: http://www.fxstreet.com/news/forex-news/article.aspx?storyid=00467b7a-7d80-4877-8b75-8a5c925085d1
I don't think the USD will head to zero whilst China holds some 2 trillion. There should at least be some relief rallies in the DXY to trade as they need something to sell into lol.
Best of luck.
