The euro fell to its lowest since October 6 against the dollar on Wednesday after a previously defended options barrier at $1.3350 fell to sellers. The dollar also climbed to a fresh session high against the yen. The euro was last down 1.3 percent against the dollar at $1.3334 after going as low as $1.3325. The dollar was last up 0.7 percent at 77.50 yen with the session peak at 77.58 yen.