For me the best broker for binary is SOLIDARY. It operates directly from metatrader 4 so there are no time lag issues that can be with other brokers operating from your platform.
Excellent broker, it´s that simple. It has never taken me more than 5 hours to process (withdrawals). I put my hands in the fire by this broker. Highly recommend.
I recommend Solidary .. they pay very fast .. !! And that you can operate from mt4 is the best! I use an EA and it works perfectly there ..