Histogram between two lines on Main Chart

[Tom Clayson]

I am trying to create an indicator that paints the area between two defined standard deviation bands. E.g. The area between the 2nd and 3rd deviations from the central MA. How can I do this? My code is below.

//+------------------------------------------------------------------+
//WBC_BollingerBand_Zone                                             |
//+------------------------------------------------------------------+
#property copyright "whitebloodcell"
#property link      ""

#property indicator_chart_window
#property indicator_buffers 7

#property indicator_color1 DimGray
#property indicator_color2 DarkGreen
#property indicator_color3 Red
#property indicator_color4 Green
#property indicator_color5 Maroon
#property indicator_color6 Red
#property indicator_color7 Green

#property indicator_width1 1
#property indicator_width2 1
#property indicator_width3 1
#property indicator_width4 1
#property indicator_width5 1
#property indicator_width6 2
#property indicator_width7 2

#property indicator_style1 STYLE_SOLID
#property indicator_style2 STYLE_SOLID
#property indicator_style3 STYLE_SOLID
#property indicator_style4 STYLE_SOLID
#property indicator_style5 STYLE_SOLID

extern int    BandsLength     =    20;
extern int    BandsMethod     =    MODE_EMA;
extern int    BandsPrice      = PRICE_CLOSE;
extern double BandsDeviation1 = 2; 
extern double BandsDeviation2 = 3; 

double MaBuffer[];
double UpperBand1[];
double LowerBand1[];
double UpperBand2[];
double LowerBand2[];

double buffer5[];
double buffer6[];

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+

int init() {
   SetIndexBuffer(0,MaBuffer);
   SetIndexBuffer(1,UpperBand1);
   SetIndexBuffer(2,LowerBand1);
   SetIndexBuffer(3,UpperBand2);
   SetIndexBuffer(4,LowerBand2);
   
   SetIndexBuffer(5,buffer5); 
   SetIndexStyle(5,DRAW_HISTOGRAM);
   SetIndexBuffer(6,buffer6); 
   SetIndexStyle(6,DRAW_HISTOGRAM);

   SetIndexLabel(0,"Bands ma");
   SetIndexLabel(1,"Bands upper band 1");
   SetIndexLabel(2,"Bands lower band 1");
   SetIndexLabel(3,"Bands upper band 2");
   SetIndexLabel(4,"Bands lower band 2");
   SetIndexLabel(5,"Zone Upper Bound");
   SetIndexLabel(6,"Zone Lower Bound");
   return(0);
}

int deinit()
{
   return(0);
}


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+

int start() {
   double sum,ma;
   int    counted_bars = IndicatorCounted();
   int    limit,i,k;


   if(counted_bars < 0) {return(-1);}
   if(counted_bars>0) {counted_bars--;}
   
   limit = Bars-counted_bars;

   for (i=limit;i>=0;i--) {
      ma = iMA(NULL,0,BandsLength,0,BandsMethod,BandsPrice,i);
            for (sum = 0.0, k = 0; k < BandsLength; k++) {
                 sum += ((Close[k+i]-ma)*(Close[k+i]-ma));
            }     

      //
      //
      //
      //
      //
      
      MaBuffer[i] = ma;
      if (BandsDeviation1!=0) {
            UpperBand1[i]  = ma+BandsDeviation1*MathSqrt(sum/BandsLength);
            LowerBand1[i]  = ma-BandsDeviation1*MathSqrt(sum/BandsLength);
      }               
      if (BandsDeviation2!=0) {
            UpperBand2[i]  = ma+BandsDeviation2*MathSqrt(sum/BandsLength);
            LowerBand2[i]  = ma-BandsDeviation2*MathSqrt(sum/BandsLength);
      } 
      //Red
      //buffer6[i] = MaBuffer[i];
      //buffer5[i] = UpperBand2[i]; 
      //buffer5[i] = MaBuffer[i];
      //buffer6[i] = LowerBand2[i]; 
   }            
   return(0);
}