Stochastic_Chart

//+------------------------------------------------------------------+
//|                                             Stochastic_Chart.mq4 |
//|                                               Yuriy Tokman (YTG) |
//|                                               http://ytg.com.ua/ |
//+------------------------------------------------------------------+
#property copyright "Yuriy Tokman (YTG)"
#property link      "http://ytg.com.ua/"
#property version   "1.00"
#property strict
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 clrDarkViolet
#property indicator_color2 clrRed
#property indicator_color3 clrLime

input int                EMA_Period   = 12;
input ENUM_MA_METHOD     EMA_Method   = 0;
input ENUM_APPLIED_PRICE EMA_Price    = 0;
input int Kperiod = 5;
input int Dperiod = 3;
input int slowing = 3;
input ENUM_MA_METHOD method = 0;
input int price_field =0;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
string name="";
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   name = "Stochastic_Chart";
   IndicatorShortName(name);
   
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexLabel(0,"Stochastic_Main");
   SetIndexDrawBegin(0,MathMax(Kperiod,EMA_Period));
   
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexLabel(1,"MA");
   SetIndexDrawBegin(1,MathMax(Kperiod,EMA_Period)); 

   SetIndexStyle(2,DRAW_LINE);
   SetIndexBuffer(2,ExtMapBuffer3);
   SetIndexLabel(2,"Stochastic_Signal");
   SetIndexDrawBegin(2,MathMax(Kperiod,EMA_Period));    
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
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 limit=rates_total/* - MathMax(EMA_Period,CCI_Period)*/ -prev_calculated;
   if(prev_calculated==0)limit--;
   else  limit++;  
   double ma=0;
   for( int i=0; i<limit && !IsStopped(); i++)
    {
     ma = iMA(NULL,0,EMA_Period,0,EMA_Method,EMA_Price,i); 
     ExtMapBuffer1[i] = ma + (iStochastic(NULL, 0, Kperiod, Dperiod, slowing, method, price_field, 0, i) - 50)*Point; 
     ExtMapBuffer2[i] = ma;
     ExtMapBuffer3[i] = ma + (iStochastic(NULL, 0, Kperiod, Dperiod, slowing, method, price_field, 1, i) - 50)*Point;       
    }   
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+