* Euro touches two-year low after Draghi statement* European stocks pullback from highs, Wall Street flat* Dollar regains traction, oil remains under pressure(Updates to U.S. markets open, changes dateline; previous LONDON)By Chuck MikolajczakNEW YORK, Nov 6 (Reuters) - The euro slumped to a two-year low and peripheral European government yields fell on Thursday after ECB chief Mario Draghi reiter