For the first time since September 2013, The USD Index just signalled a "death cross." Three of the last four times that the 50-day moving-average crossed below the 200-day moving-average, The USD Index tumbled significantly.
The U.S. dollar index had a nice run during the back half of 2014 and early 2015, but the rally has lost stream. In fact, the USD has put in a series of lower highs since peaking at 100 during March. There is technical support around the current level, but plenty of downside ahead should this support level fail. The RSI is pointed lower with room to drop a bit more before becoming oversold.