The US Dollar Index is trading at the lowest level that it has been at since December of 2014. It is currently trading around $92.35. Over the past almost three years, the last eight times that it traded down to around the $93-94 level it rallied. This means that important support may have been broken.
There is a chance that it trades significantly lower because there is not clearly defined support between current levels and the levels around $80. That is where it was in mid 2014 when a significant rally followed. This looks like it may be a classic long-term reversal pattern.