Markets are already pricing in expectations that the central bank will hold off on any reduction in its $85-billion-a-month bond-buying program until next year, which could result in limited movement for major currency crosses.
(Read more: Dollar braces for dovish Fed, gloomy US data)
"In any case, the Fed will probably consider it way too premature to initiate 'taper' just yet. As such, we expect this week's FOMC to be uneventful," said Vishnu Varathan of Mizuho Bank.
The index fell below its 200-day simple moving average of 81.75 on September 16 and has been steadily falling ever since. In light of its recent weakness, how are you trading the dollar index?