Stochastic Custom

ÿþ//+------------------------------------------------------------------+

//|                                            Stochastic Custom.mq5 |

//|                              Copyright © 2018, Vladimir Karputov |

//|                                           http://wmua.ru/slesar/ |

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

#property copyright "Copyright © 2018, Vladimir Karputov"

#property link      "http://wmua.ru/slesar/"

#property version   "1.000"

#property description "Stochastic Custom"

//--- indicator settings

#property indicator_separate_window

#property indicator_buffers 4

#property indicator_plots   2

#property indicator_type1   DRAW_LINE

#property indicator_type2   DRAW_LINE

#property indicator_color1  clrLightSeaGreen

#property indicator_color2  clrRed

#property indicator_style2  STYLE_DOT

//--- input parameters

input int      Inp_STO_KPeriod= 5;     // K period

input int      Inp_STO_DPeriod= 3;     // D period

input int      Inp_STO_Slowing= 3;     // Slowing

input int      Inp_STO_Level1 = 25.0;  // Value Level #1

input double   Inp_STO_Level2 = 75.0;  // Value Level #2

//--- indicator buffers

double    ExtMainBuffer[];

double    ExtSignalBuffer[];

double    ExtHighesBuffer[];

double    ExtLowesBuffer[];

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

//| Custom indicator initialization function                         |

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

void OnInit()

  {

//--- indicator buffers mapping

   SetIndexBuffer(0,ExtMainBuffer,INDICATOR_DATA);

   SetIndexBuffer(1,ExtSignalBuffer,INDICATOR_DATA);

   SetIndexBuffer(2,ExtHighesBuffer,INDICATOR_CALCULATIONS);

   SetIndexBuffer(3,ExtLowesBuffer,INDICATOR_CALCULATIONS);

//--- set accuracy

   IndicatorSetInteger(INDICATOR_DIGITS,2);

//--- set levels

   IndicatorSetInteger(INDICATOR_LEVELS,2);

   IndicatorSetDouble(INDICATOR_LEVELVALUE,0,Inp_STO_Level1);

   IndicatorSetDouble(INDICATOR_LEVELVALUE,1,Inp_STO_Level2);

//--- set maximum and minimum for subwindow 

   IndicatorSetDouble(INDICATOR_MINIMUM,0);

   IndicatorSetDouble(INDICATOR_MAXIMUM,100);

//--- name for DataWindow and indicator subwindow label

   IndicatorSetString(INDICATOR_SHORTNAME,"Stoch("+

                      (string)Inp_STO_KPeriod+","+

                      (string)Inp_STO_DPeriod+","+

                      (string)Inp_STO_Slowing+")");

   PlotIndexSetString(0,PLOT_LABEL,"Main");

   PlotIndexSetString(1,PLOT_LABEL,"Signal");

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

   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,Inp_STO_KPeriod+Inp_STO_Slowing-2);

   PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,Inp_STO_KPeriod+Inp_STO_DPeriod);

//--- initialization done

  }

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

//| Relative Strength Index                                          |

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

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,k,start;

//--- check for bars count

   if(rates_total<=Inp_STO_KPeriod+Inp_STO_DPeriod+Inp_STO_Slowing)

      return(0);

//---

   start=Inp_STO_KPeriod-1;

   if(start+1<prev_calculated) start=prev_calculated-2;

   else

     {

      for(i=0;i<start;i++)

        {

         ExtLowesBuffer[i]=0.0;

         ExtHighesBuffer[i]=0.0;

        }

     }

//--- calculate HighesBuffer[] and ExtHighesBuffer[]

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

     {

      double dmin=1000000.0;

      double dmax=-1000000.0;

      for(k=i-Inp_STO_KPeriod+1;k<=i;k++)

        {

         if(dmin>low[k])  dmin=low[k];

         if(dmax<high[k]) dmax=high[k];

        }

      ExtLowesBuffer[i]=dmin;

      ExtHighesBuffer[i]=dmax;

     }

//--- %K

   start=Inp_STO_KPeriod-1+Inp_STO_Slowing-1;

   if(start+1<prev_calculated) start=prev_calculated-2;

   else

     {

      for(i=0;i<start;i++) ExtMainBuffer[i]=0.0;

     }

//--- main cycle

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

     {

      double sumlow=0.0;

      double sumhigh=0.0;

      for(k=(i-Inp_STO_Slowing+1);k<=i;k++)

        {

         sumlow +=(close[k]-ExtLowesBuffer[k]);

         sumhigh+=(ExtHighesBuffer[k]-ExtLowesBuffer[k]);

        }

      if(sumhigh==0.0) ExtMainBuffer[i]=100.0;

      else             ExtMainBuffer[i]=sumlow/sumhigh*100;

     }

//--- signal

   start=Inp_STO_DPeriod-1;

   if(start+1<prev_calculated) start=prev_calculated-2;

   else

     {

      for(i=0;i<start;i++) ExtSignalBuffer[i]=0.0;

     }

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

     {

      double sum=0.0;

      for(k=0;k<Inp_STO_DPeriod;k++) sum+=ExtMainBuffer[i-k];

      ExtSignalBuffer[i]=sum/Inp_STO_DPeriod;

     }

//--- OnCalculate done. Return new prev_calculated.

   return(rates_total);

  }

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