RSI and Envelopes on same chart


I have this chart on Boom 1000. The goal is to have the RSI and the Envelopes on the same indicator window. Once I drag the Envelopes on the RSI chart I get this popup asking to choose the Apply to.

So now what Im trying to figure out is how to code the exact same thing using MQL5 but still apply the Envelope to the close and still have them appear on the same RSI window as shown below

Anytime I code this Envelope using the Price close as the handle it appears on the main chart not on the RSI chart. 

Envelopes - Trend Indicators - Technical Indicators - Price Charts, Technical and Fundamental Analysis - MetaTrader 5 Help
Envelopes Technical Indicator is formed with two Moving Averages , one of which is shifted upward and another one is shifted downward. The...
mql5.jpeg  140 kb