The Moving Average Envelopes Percentage indicator shows the price as a percentage of the Envelopes channel.

There are five inputs:

• Period - calculation period;
• Deviation;
• Applied price;
• Overbought - the overbought level is set to 100% of the Envelopes channel by default;
• Oversold - the oversold level is set to 0% (bottom edge) of the Envelopes channel by default.

MAE = 100 * (Applied price - DN) / (UP - DN)

UP = MA * (1+Deviation / 100.0)  DN = MA * (1-Deviation / 100.0)  MA - MA(Applied price, Period)  

Fig. 1. MAE

Fig. 2. MAE + Envelopes