The weekly dollar index chart shows several interesting patterns. These set up the trigger points for a breakout to new dollar strength, or a breakdown for new dollar weakness. On balance, the bias is towards renewed dollar strength.
The first key feature on the chart are the support and resistance levels. Combined, these provide a very broad trading band. The support level is near $0.93 that was tested multiple times in 2015. The dollar index has dipped below this briefly, but usually rebounded quickly from this support level.
The resistance level is near $100.005 This level was tested twice in 2015. It's not a well-tested level, so it leaves open the potential for the dollar to strengthen considerably.
The second key feature is the down-sloping trend channel. For most of 2016, the index has moved between these sloping support and resistance lines. It has been a pattern of rally and retreat. The current rally faces trend line resistance near $0.96.