Two colored filled rectangles drawn between the values ​​of two GRFLeadingEdger indicator channels on one bar.

Indicator input parameters:

//+------------------------------------------------+ 
//|  Indicator input parameters                    |
//+------------------------------------------------+ 
input string Symbols_Sirname="GRFLeadingEdger_Pivot_";  // Name for the indicator labels
input uint Samples=60;
input int  LookAhead=0;
input double StdLevel1=2.0;
input double  StdLevel2=4.0;
input color Up_Color=clrSpringGreen;                    // The color of the upper band of the indicator
input color Dn_Color=clrYellow;                         // The color of the lower band of the indicator
input uint SignalBar=0;                                 // Bar index to get the indicator values
input uint SignalLen=40;                                // The length of the indicator bands

The indicator uses SmoothAlgorithms.mqh library classes (copy it to <terminal_data_folder>\MQL5\Include). The use of the classes was thoroughly described in the article Averaging Price Series for Intermediate Calculations Without Using Additional Buffers.

Fig1. Indicator GRFLeadingEdger_Pivot