Which MT4 versions is the best, I dont believe that every update to the latest version will bring fix to the old version, sometimes it will drop certain function so what do you know about special advantage of older version.

Also anybody know how much MT4 software cost for brokers, I wonder why so many small brokers could offer MT4 platform, are they cheap. As far as I know Metatrader cost is more than $ 300,000 for big brokers licence