Windows RT is developed for ARM based CPUs (not Intel or AMD CPUs in non-RT computers). There is a program and procedure you can use to "jailbreak" your RT system which will allow you to run some Windows programs that can run on ARM processor. Unfortunately `meta trader 4` software ' is not one of those. Sorry.
The only way to use your computer with this software is to run the software on a desktop and use LogMeIn or TeamViewer on your tablet to access the desktop.