edit: regarding your comment that playing mt4 can give high returns, that is entirely misleading.
aside from that...
the company's website is
http://metaquotes.net
see:
http://mql4.com for a popular forum for metatrader.
as a software engineer with thirty years of experience, i tell you that it is my favorite platform, and it is free.
even citibank uses it. see:
http://www.citifxpro.com/metatrader-4
a couple of suggestions of other solid forex brokers that use metatrader are
http://ibfx.com and
http://forex.com
it is my forex platform of choice.
i have been writing code on it for about seven years now.
my current software project of nine years uses the metatrader platform exclusively.
my nickname for it is metatarded (metatrader +retarded), lol.
attached is a snapshot of my current demo trades.
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