Momentum candle open to close price, please help me create this thanks

//| Momentum candles.mq5 |

//| by cja |

//+------------------------------------------------------------------+

#property copyright "Copyright 2013, MetaQuotes Software Corp."

#property link "MQL5: automated forex trading, strategy tester and custom indicators with MetaTrader"

#property version "1.00"

#property indicator_chart_window

#property indicator_buffers 5

#property indicator_plots 1

#property indicator_type1 DRAW_COLOR_CANDLES

#property indicator_color1 Green,Red,Gray

#property indicator_width1 3

#property indicator_label1 "Momentum Candles"

input int CandlePipValue = 10;

//--- indicator buffers

double ExtOBuffer[];

double ExtHBuffer[];

double ExtLBuffer[];

double ExtCBuffer[];

double ExtColorBuffer[];

//--- handles of indicators

//--- bars minimum for calculation

#define DATA_LIMIT 38

//+------------------------------------------------------------------+

//| Custom indicator initialization function |

//+------------------------------------------------------------------+

void OnInit()

{

//--- indicator buffers mapping

SetIndexBuffer(0,ExtOBuffer,INDICATOR_DATA);

SetIndexBuffer(1,ExtHBuffer,INDICATOR_DATA);

SetIndexBuffer(2,ExtLBuffer,INDICATOR_DATA);

SetIndexBuffer(3,ExtCBuffer,INDICATOR_DATA);

SetIndexBuffer(4,ExtColorBuffer,INDICATOR_COLOR_INDEX);

//---

IndicatorSetInteger(INDICATOR_DIGITS,_Digits);

//--- sets first bar from what index will be drawn

IndicatorSetString(INDICATOR_SHORTNAME,"Momentum Candles");

//--- don't show indicator data in DataWindow

PlotIndexSetInteger(0,PLOT_SHOW_DATA,false);

//--- sets first candle from what index will be drawn

PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,DATA_LIMIT);

//--- get handles

//--- 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 &TickVolume[],

const long &Volume[],

const int &Spread[])

{

int i,limit;

//--- we can copy not all data

int to_copy;

if(prev_calculated>rates_total || prev_calculated<0) to_copy=rates_total;

else

{

to_copy=rates_total-prev_calculated;

if(prev_calculated>0) to_copy++;

}

//--- set first bar from what calculation will start

if(prev_calculated<DATA_LIMIT)

limit=DATA_LIMIT;

else

limit=prev_calculated-1;

double pipModifier=1;

if (_Digits==3 || _Digits==5) pipModifier=10;

//--- the main loop of calculations

for(i=limit;i<rates_total && !IsStopped();i++)

{

ExtOBuffer=Open;

ExtHBuffer=High;

ExtLBuffer=Low;

ExtCBuffer=Close;

//--- set color for candle

ExtColorBuffer=2.0; // set gray Color

//--- check for Green Zone and set Color Green

if(Open>Close && (Open-Close)>=CandlePipValue*_Point*pipModifier)

ExtColorBuffer=1.0;

//--- check for Red Zone and set Color Red

if(Open=CandlePipValue*_Point*pipModifier)

ExtColorBuffer=0.0;

}

//--- return value of prev_calculated for next call

return(rates_total);

}

//+------------------------------------------------------------------+