Currency: Will the euro rally continue?

Since the end of last year the euro-dollar exchange rate has appreciated 15%. The rally is a noticeable divergence from the trend witnessed since the fnancial crisis. A decade ago, the euro traded as high as 1.60 to the dollar but has been subject to regular bouts of weakness, most noticeably during the 2014/2015 sovereign debt crisis when it slumped 23%. For the long-term investor, does the recent rally indicate that the persistent euro downtrend is over?