Dollar Index is currently testing a significant resistance cluster 104.85 - 105.50. The reaction of the price to that area will determine a further direction of the Index.
Bullish breakout of that and a weekly candle close above will confirm a long-term bullish reversal, with a highly probable consiquent bullish rally.
Alternatively, watch a rising parallel channel on a daily. Its support breakout will initiate a correctional movement.
I will post the update once I spot a solid confirmation. For now, stay patient and wait for the reaction.