Hi Fabian, 

Are you trying to shift the entire "custom HTML" object to the right, or just the text?  If it's just text, you can just use the align-right feature, like so: 

Perhaps you are inserting other data in there that somehow breaks the existing alignment?  Or are you trying to place the entire object to the right of another field / object?  Or something else entirely?

All of this should be possible, but we would need some more details on what you're trying to do and what problems, specifically, you're facing.