Here are a couple of charts of long term USD and Euro. The Euro looks set to resume the long term trend. And by inference the USD should commence another leg down in it's long term decline.
USD weakness has probably been overshadowed by the recent weakness in the JPY as that country tries to get the advantage in the export markets.
The demise of the USD may be more related to the rise of China as a world power and the decline of the USD as a medium of exchange for oil.