USD index: time for correction

As we've noticed in April 2018 USD (the link you can find below) was very strong for 4 months but every movement needs a correction.
DXY as a major USD force index shows us a potential move back to the frame of the recent pattern.
What could it cause?
Almost all the commodity, energy and metal instruments were under USD strengthening pressure during 2018 and now it is a good point to recover.