Some brokers have micro-lots (0.01 for example) for MT4:
http://neuimex.ch/
and
http://www.interbankfx.com
For InterbankFX received the answer:
"Only on MT4 for micro lots. Unfortunately we are allowing any new customers to use MT4 until the bugs are worked out of it. I’m sorry I don’t have any dates yet. Please keep checking."
My question: "Yes but ... MT4 is newest version of MetaTrader ... Do you expect an other version? MT5?"
Answer: "Yes MT 4 is the newest version however 3.83 is the more stable version."