One reason is that the Dollar Index largest constituent is the Euro. The Euro chart shows a basing pattern at the cyclical low and a bullish descending wedge hitting long term support…

I’m still unsure if the Dollar has a final surge left in it. Repeated failures at 98 (which is also an important Fib level) leave me thinking it probably doesn’t. TRIX (40) has been very reliable and it’s turned down now.