Change the color of bulish and bearish

I wrote an indicator that shows Open of current candle is equal to Close of previous candle. but I don't know how to change the color of High/Low shadow for bullish and Bearish candles.

Is it possible to change the color of each candle in for loop?

is it possible to change the color of High/Low shadow for bearish and bullish candle same as body?

I attach my .mq4 file please have look. it take just a second time.

//+------------------------------------------------------------------+
//|                                                    Candle_OC.mq4 |
//|                   Copyright 2006-2016, MetaQuotes Software Corp. |
//|                                              http://www.mql4.com |
//+------------------------------------------------------------------+
#property copyright   "2006-2014, MetaQuotes Software Corp."
#property link        "http://www.mql4.com"
#property strict

#property indicator_chart_window
#property indicator_buffers 4
#property indicator_color1 White
#property indicator_color2 White
#property indicator_color3 Red
#property indicator_color4 White
#property indicator_width1 1
#property indicator_width2 1
#property indicator_width3 3
#property indicator_width4 3

//---
input color ExtColor1 = Red;
input color ExtColor2 = White;


//--- buffers
double NewLowBuffer[];
double NewHighBuffer[];
double NewOpenBuffer[];
double NewCloseBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//|------------------------------------------------------------------|
void OnInit(void)
  {
   IndicatorShortName("Candle_OC");
   IndicatorDigits(Digits);
//--- indicator lines
   SetIndexStyle(0,DRAW_HISTOGRAM,0,1,clrNONE);
   SetIndexBuffer(0,NewLowBuffer);
   SetIndexStyle(1,DRAW_HISTOGRAM,0,1,clrNONE);
   SetIndexBuffer(1,NewHighBuffer);
   SetIndexStyle(2,DRAW_HISTOGRAM,0,3,ExtColor1);   
   SetIndexBuffer(2,NewOpenBuffer);
   SetIndexStyle(3,DRAW_HISTOGRAM,0,3,ExtColor2);
   SetIndexBuffer(3,NewCloseBuffer);
//---
   SetIndexLabel(0,"Low/High");
   SetIndexLabel(1,"High/Low");
   SetIndexLabel(2,"Open");
   SetIndexLabel(3,"Close");
   SetIndexDrawBegin(0,10);
   SetIndexDrawBegin(1,10);
   SetIndexDrawBegin(2,10);
   SetIndexDrawBegin(3,10);
//--- indicator buffers mapping
   SetIndexBuffer(0,NewLowBuffer);
   SetIndexBuffer(1,NewHighBuffer);
   SetIndexBuffer(2,NewOpenBuffer);
   SetIndexBuffer(3,NewCloseBuffer);
//--- initialization done
  }
//+------------------------------------------------------------------+
//|                                                     |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
const int prev_calculated,const datetime &time[],
const double &open[],const double &high[],const double &low[],
const double &close[],const long &tick_volume[],
const long &volume[],const int &spread[])
  {
   int   i,pos;
//---
   if(rates_total<=10)
      return(0);
//--- counting from 0 to rates_total
   ArraySetAsSeries(NewLowBuffer,false);
   ArraySetAsSeries(NewHighBuffer,false);
   ArraySetAsSeries(NewOpenBuffer,false);
   ArraySetAsSeries(NewCloseBuffer,false);
   ArraySetAsSeries(open,false);
   ArraySetAsSeries(high,false);
   ArraySetAsSeries(low,false);
   ArraySetAsSeries(close,false);

   NewLowBuffer[0]=low[0];
   NewHighBuffer[0]=high[0];
   NewOpenBuffer[0]=open[0];
   NewCloseBuffer[0]=close[0];

   for(i=pos+1; i<rates_total; i++)
     {
      NewLowBuffer[i]=low[i]; 
      NewHighBuffer[i]=high[i];
      NewOpenBuffer[i]=close[i-1];
      NewCloseBuffer[i]=close[i];      
      if(NewOpenBuffer[i]<NewCloseBuffer[i]) SetIndexStyle(1,DRAW_HISTOGRAM,0,1,clrWhite);
      else if(NewOpenBuffer[i]>=NewCloseBuffer[i]) SetIndexStyle(1,DRAW_HISTOGRAM,0,1,clrRed);
      
     }
               
      return(rates_total);     
}
//+------------------------------------------------------------------+