I believe it also. Haven't seen MT4 being used for another thing than for currency trader. I guess it was only developed for that, but there are other platforms for other things, you just need to find them.
Well if this is your first time at trading stocks, you should read a bit more on how to trade and try to find if, like when trading currencies, there's any type of demo trading so you can get to practice before going with the real money.