Initially it provided a basis for people to take profits on their dollar shorts because what the Fed was saying was they may not know with certainty that they will pause (in raising rates) and ....therefore there's no reason to get your groove on and sell dollars.
People are coming to the realization there is a very high likelihood that the BOJ next week are going to stop quantitative easing or begin to unwind it, and there is a lot of market focus on Japan CPI data later this week.