//+------------------------------------------------------------------+ 
//|                                                   MACD_Cloud.mq5 | 
//|                      Copyright © 2005, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"
//--- Indicator version
#property version   "1.00"
#property description "MACD_Cloud"
//--- Indicator version
#property version   "1.00"
//---- Drawing the indicator in the main window
#property indicator_separate_window
//---- number of indicator buffers is 2
#property indicator_buffers 2 
//---- one plot is used
#property indicator_plots   1
//+-----------------------------------+
//|  Declaration of constants         |
//+-----------------------------------+
#define RESET  0 // a constant for returning the indicator recalculation command to the terminal
//+-----------------------------------+
//|  Parameters of indicator drawing  |
//+-----------------------------------+
//---- drawing the indicator as a colored cloud
#property indicator_type1   DRAW_FILLING
//---- the following colors are used as the indicator colors
#property indicator_color1  clrDodgerBlue,clrDeepPink
//--- displaying the indicator label
#property indicator_label1  "MACD_Cloud"
//+-----------------------------------+
//|  Indicator input parameters       |
//+-----------------------------------+
input uint FastMACD     = 12;
input uint SlowMACD     = 26;
input uint SignalMACD   = 9;
input ENUM_APPLIED_PRICE   PriceMACD=PRICE_CLOSE;
//+-----------------------------------+
//--- declaration of integer variables for the start of data calculation
int  min_rates_total;
//--- declaration of dynamic arrays that
//--- will be used as indicator buffers
double ExtABuffer[];
double ExtBBuffer[];
//--- declaration of integer variables for the indicators handles
int MACD_Handle;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- initialization of variables of the start of data calculation
   min_rates_total=int(SignalMACD+MathMax(FastMACD,SlowMACD));
//--- getting the handle of iMACD
   MACD_Handle=iMACD(NULL,0,FastMACD,SlowMACD,SignalMACD,PriceMACD);
   if(MACD_Handle==INVALID_HANDLE)
     {
      Print(" Failed to get the handle of iMACD");
      return(INIT_FAILED);
     }
//--- Set dynamic array as an indicator buffer
   SetIndexBuffer(0,ExtABuffer,INDICATOR_DATA);
//--- Indexing elements in the buffer as in timeseries
   ArraySetAsSeries(ExtABuffer,true);
//--- Set dynamic array as an indicator buffer
   SetIndexBuffer(1,ExtBBuffer,INDICATOR_DATA);
//--- Indexing elements in the buffer as in timeseries
   ArraySetAsSeries(ExtBBuffer,true);
//--- shifting the start of drawing of the indicator
   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,min_rates_total);
//--- setting the indicator values that won't be visible on a chart
   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,EMPTY_VALUE);
//--- creation of the name to be displayed in a separate sub-window and in a pop up help
   IndicatorSetString(INDICATOR_SHORTNAME,"MACD_Cloud");
//--- determining the accuracy of the indicator values
   IndicatorSetInteger(INDICATOR_DIGITS,0);
//--- initialization end
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+  
//| Custom indicator iteration function                              | 
//+------------------------------------------------------------------+  
int OnCalculate(const int rates_total,    // number of bars in history at the current tick
                const int prev_calculated,// amount of history in bars at the previous tick
                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[])
  {
//--- checking if the number of bars is enough for the calculation
   if(BarsCalculated(MACD_Handle)<rates_total || rates_total<min_rates_total) return(RESET);
//--- declarations of local variables 
   int to_copy,limit;
//--- calculation of the 'limit' starting index for the bars recalculation loop
   if(prev_calculated>rates_total || prev_calculated<=0)// Checking for the first start of the indicator calculation
      limit=rates_total-min_rates_total-1; // Starting index for calculation of all bars
   else limit=rates_total-prev_calculated;  // starting index for calculation of new bars

   to_copy=limit+1;
//--- copy newly appeared data in the arrays
   if(CopyBuffer(MACD_Handle,MAIN_LINE,0,to_copy,ExtABuffer)<=0) return(RESET);
   if(CopyBuffer(MACD_Handle,SIGNAL_LINE,0,to_copy,ExtBBuffer)<=0) return(RESET);
//--- main indicator calculation loop
   for(int bar=limit; bar>=0 && !IsStopped(); bar--)
     {
      ExtABuffer[bar]/=_Point;
      ExtBBuffer[bar]/=_Point;
     }
//---    
   return(rates_total);
  }
//+------------------------------------------------------------------+