The answer to your question is most likely on this page:Hi all, Does anyone know why Quandl published MXP futures prices 1x10^6 times the quotes on CME?
https://www.quandl.com/data/CME/MPZ2017-Mexican-Peso-Futures-December-2017-MPZ2017
http://www.cmegroup.com/trading/fx/emerging-market/mexican-peso.html
Apologies if I am being dense! (I blame it on last nights burrito)