I would like to place this "MetaTrader 5 download free" image in one website in order for visitors to download MetaTrader.
Is it legal to take that image and place it wherever you'd want?
So your weblink should be welcome if not directly rewarded.
In your Profile -> Achievements page you can see the last line says:
To the MetaTrader 5 Terminal
I ask because sometimes there is some fine print specifying how companies' logos, icons, etc. must be used.
I understand it can be done without problem.