Comparison :
Upper is the indicator posted by mrtools
Lower is "your" indicator
As you can see, the values are exactly the same. Except that the version posted by mrtools has nma for signal line instead of what "your" indicator has and that is what you have asked for (to have a histogram rsi with nma signal line). Since it has been made as you asked for (and mrtools made much more), any further post or comment (being that the comparison from the picture clearly shows that what you have asked for was already made), any further post in the direction that you are proceeding without a cause coming from you will be treated as a malicious trolling,
regards