LONDON (Reuters) - The euro rallied to its highest levels in nearly two months against the dollar on Thursday after the European Union and Britain struck a Brexit deal.Though the deal remains to be ratified by British lawmakers, traders briefly sent the British pound and the euro up by more than one percent and 0.5 percent respectively.The euro has struggled, falling more than 3% so far this year, as a broader economic slowdown in Europe fuelled by the protracted trade war between Washington..