The daily chart of the US Dollar Index shows that the dollar is trying to put in a bottom. The encouraging signs are that the 9-year low earlier this month survived a sharp retest this week, the index has broken above the short-term declining tops line, and there is a PMO crossover buy signal. The problem is that sentiment has moved from extreme bearishness to neutral, which means that quite a few bulls have arrived on the scene. This happened too quickly, in my opinion, and there may be more work to do (and lower lows seen) before the bottoming process is complete.
There is encouragement on the long-term (monthly) chart as well, because there is a strong zone of support between 78 and 80, and the PMO is very overbought. Nevertheless, the PMO is still falling, and it needs to turn up before we can begin to believe the long-term down trend has ended.