indicator count and indicator array order

hi

i've got this code iv worked  to make better indicator coding skills and what im hoping to do is to replace the candlesticks.

suggestions?

//+------------------------------------------------------------------+
//|   Indicator Name: ChartBucket
//|      E-mail: subgenius@inbox.com
//+------------------------------------------------------------------+
#property copyright "Copyright 2016, Brian Lillard"
#property link      "http://5026.net78.net/"
#property version   "1.00"
#property strict
#property indicator_chart_window
#property indicator_buffers 4
//+------------------------------------------------------------------+
color   HL_Bull             = Lime;
int     HL_Bull_Width       = 1;
color   OC_Bull             = Lime;
int     OC_Bull_Width       = 6;
//--
color   HL_Bear             = Red;
int     HL_Bear_Width       = 1;
color   OC_Bear             = Red;
int     OC_Bear_Width       = 6;
//--
//+------------------------------------------------------------------+
double ExtMapBuffer1[]; 
double ExtMapBuffer2[];
double ExtMapBuffer3[]; 
double ExtMapBuffer4[];
//-
int ExtCountedBars=0;
//+------------------------------------------------------------------+
int init()
 {
 SetIndexBuffer(0,ExtMapBuffer1); SetIndexStyle(0,DRAW_HISTOGRAM,0,HL_Bear_Width,HL_Bear);
 SetIndexBuffer(1,ExtMapBuffer2); SetIndexStyle(1,DRAW_HISTOGRAM,0,HL_Bull_Width,HL_Bull);
 SetIndexBuffer(2,ExtMapBuffer3); SetIndexStyle(2,DRAW_HISTOGRAM,0,OC_Bear_Width,OC_Bear);
 SetIndexBuffer(3,ExtMapBuffer4); SetIndexStyle(3,DRAW_HISTOGRAM,0,OC_Bull_Width,OC_Bull);
 return(0);
 }
//+------------------------------------------------------------------+
int start()
 {
 ExtCountedBars=IndicatorCounted();
 if(ExtCountedBars<0){return(-1);}
 if(ExtCountedBars>0){ExtCountedBars--;}
 int pos=Bars-ExtCountedBars-1;
 while(pos>=0)
  {
  //set tops & bottoms
  if(Open[pos]<Close[pos])
   {
   ExtMapBuffer1[pos]=Low[pos]; 
   ExtMapBuffer2[pos]=High[pos];
   }
  else
   {
   ExtMapBuffer1[pos]=High[pos]; 
   ExtMapBuffer2[pos]=Low[pos];
   }
  //set body
  ExtMapBuffer3[pos]=Open[pos]; 
  ExtMapBuffer4[pos]=Close[pos];
  //-
  pos--;
  }
 return(0);
 }