CITI: A pattern is popping up in the euro that suggests it could soar 20%

The euro is on track to post its biggest annual gain since 2003.
An "outside year" could occur for just the third time since floating exchange rates began in the 1970s.
The CitiFX Technicals team says the euro could hit 1.30 against the dollar in 2018 if that occurs.
 
The euro is poised to end its three-year losing streak in 2017, with a gain of 10.88% against the dollar so far, according to Markets Insider data. While that would account for the single currency's biggest annual gain