* ECB comments suppress euro, dollar perks up ahead of Fed
* Dollar's path unlikely to be changed by Fed's Powell
* A USD index month-end close under long-term 91.729 Fibo would be negative
* USD's fate pinned to biggest components of the index: euro and yen
(Martin Miller is a Reuters market analyst. The views expressed are his own) ((martin.miller@thomsonreuters.com))
