how to choose mt4 or mt5?

As we know, instaforex has two software where we can trade. If we MT4 then, what is the purpose of choosing it? And if MT5 then, what is its purpose?

What are the special reasons to choose one of these software for trading?

Brother mujay jo lag raha hai k Mt4 sub say simple hai our is ko use b sub k sub trader kartay hai so mt4 like brother is liyeh koi k start say lay kar abi tak only mt4 hi use kar raha ho our is may bahot say tool hai jo simple hai our bahot powerful hai more terminal say

iss ko use bh sab kay asb trader karty hai nto iss liye koi k start salay kar bhi tak only mt4 he use kar raha ho or iss meinbohot say tool hain jo smple hai or bohot he achy bhi hain to iss ko use karna chahiye.