That will be something that you will have to gradually earn I guess. If I were you, I wouldn't bother morvillz7z and ask him to remove your negative tag as that might be the exact reason why he won't do it.

You plagiarized plenty of technical analysis and now you have to prove that you are willing to change. The admins haven't banned you (yet) so take that as a good sign. Many users didn't get a second chance, you did. That negative tag could stay with you forever, or be removed if morvillz7z notices an improvement on your end.