Most undervalued IMHO: Zero (ZER). Super advanced technology and currently only on Cryptopia. Going for Bittrex soon + a ton of other great news to be announced in Q1. Easy x20 in Q1.
PURE also has a great technology with PoS and Masternodes. Little to no downside risk at current price and very good candidate for x10
PRL: although somewhat higher market cap, still has the x5 potential for Q1. Community is growing exponentially.
ELIX: I think enough has already been mentioned about this coin. This rocket is about to go to the moon very soon.
XCPO: benefits of an extremely fast growing industry (e-commerce) + PoS.