I would say that RT Forex North on Collective2 is the best "tracked" Forex signal service. If you put the following into the grid on C2, it also comes up as the 2nd best system on C2.
Grid:
(Age > 2 yrs, Sharpe > 1, last 90 days > 1.5, last 60 days > 2,
max draw down < 19, realism > 90)...