An 'honest Metatrader-supporting broker' is an oxymoron - the platform is free to us (whereas brokers pay $100,000, with re-occuring fees) for a reason, namely it is specifically designed to cheat its customers, and attracts the worst possible type of broker as a result! There is not a single MT-broker that could be rated as 'good' - if you are a good trader, they enable the many plugin features Metatrader has become infamous for, (stop-hunting, freezing, requotes etc.) and if this doesn't work for them, they will close your account and/or refuse to pay you. On the other hand, if you're crap at trading, you'll proabaly be allowed to lose your money to them 'honourably'...

Anyway you look at it, imo, Metatrader brokers have zero to offer except financial & emotional pain and suffering - best 'exploit' MT for its charting and signals but execute the actual trades through a 'respectable' broker...