LONDON—The euro edged up on Wednesday but was off Friday’s three-week high, as traders looked for clues as to when the European Central Bank will hike interest rates. The dollar was little changed, a day before the release of U.S. consumer price data that may offer new indications about the pace of the Federal Reserve’s monetary tightening. Investors have been revising their forecasts for ECB rate hikes after the bank caught them off guard last week, with President Christine Lagarde flagging for the first time that monetary tightening was a possibility. Seeking to temper investors’ growing expectations for aggressive action, Lagarde then said on Monday there was no need for extensive tightening. However, Bundesbank President Joachim Nagel said in an interview to German newspaper Die Zeit on Wednesday that the ECB could raise interest rates this year as inflation was proving to be high for longer than expected. “We are …