There are absolutely no natural market forces imo, until the distortion gets so extreme, only THEN do market forces take hold. The big dollar run-up in June 2014 was imo a man made MANUAL adjustment, putting the so called US recovery on hold, and simultaneously stimulate non US countries.
There is always a long time lag between action and reaction. So cutting off the USA in 2014, has started to take effect, so they are simply rotating the currency punch bowl BACK to the USA, and the other foreign countries got their “spin” and will be ok for a few years, baring another 2008 meltdown.