Volume Average

ÿþ//------------------------------------------------------------------

#property copyright "© mladen, 2018"

#property link      "mladenfx@gmail.com"

#property version   "1.00"

//------------------------------------------------------------------

#property indicator_separate_window

#property indicator_buffers 3

#property indicator_plots   2

#property indicator_label1  "Volume"

#property indicator_type1   DRAW_COLOR_HISTOGRAM

#property indicator_color1  clrDarkGray,clrYellowGreen,clrOrange,clrGreen,clrRed

#property indicator_width1  2

#property indicator_label2  "Average"

#property indicator_type2   DRAW_LINE

#property indicator_color2  clrDarkGray

//---

enum enMaTypes

  {

   ma_sma,    // Simple moving average

   ma_ema,    // Exponential moving average

   ma_smma,   // Smoothed MA

   ma_lwma    // Linear weighted MA

  };

//---

enum enVolumeType

  {

   vol_ticks, // Use ticks

   vol_volume // Use real volume

  };

//--- input parameters  

input enVolumeType inpVolumeType      = vol_ticks; // Volume type to use

input int          inpAveragePeriod   = 50;        // Average period

input enMaTypes    inpAverageMethod   = ma_ema;    // Average method

input double       inpBreakoutPercent = 50;        // Breakout percentage

//--- buffers

double  val[],valc[],average[];

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

//| Custom indicator initialization function                         | 

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

void OnInit()

  {

//---- indicator buffers mapping

   SetIndexBuffer(0,val,INDICATOR_DATA);

   SetIndexBuffer(1,valc,INDICATOR_COLOR_INDEX);

   SetIndexBuffer(2,average,INDICATOR_DATA);

   string _avgNames[]={"SMA","EMA","SMMA","LWMA"};

   IndicatorSetString(INDICATOR_SHORTNAME,"Volume "+_avgNames[inpAverageMethod]+" average ("+(string)inpAveragePeriod+")");

  }

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

//| 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[])

  {

   if(Bars(_Symbol,_Period)<rates_total) return(-1);

   int i=(int)MathMax(prev_calculated-1,0); for(; i<rates_total && !_StopFlag; i++)

     {

      double _volume=double((inpVolumeType==vol_ticks) ? tick_volume[i]: volume[i]);

      average[i] = iCustomMa(inpAverageMethod,_volume,inpAveragePeriod,i,rates_total);

      val[i]     = _volume;

      valc[i]    = 0;

      if(i>0 && close[i] > close[i-1])  valc[i] = (_volume > average[i]*(1+inpBreakoutPercent*0.01)) ? 3 : 1;

      if(i>0 && close[i] < close[i-1])  valc[i] = (_volume > average[i]*(1+inpBreakoutPercent*0.01)) ? 4 : 2;

     }

   return(i);

  }

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

//| Custom functions                                                 |

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

#define _maInstances 1

#define _maWorkBufferx1 1*_maInstances

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

//|                                                                  |

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

double iCustomMa(int mode,double price,double length,int r,int bars,int instanceNo=0)

  {

   switch(mode)

     {

      case ma_sma   : return(iSma(price,(int)length,r,bars,instanceNo));

      case ma_ema   : return(iEma(price,length,r,bars,instanceNo));

      case ma_smma  : return(iSmma(price,(int)length,r,bars,instanceNo));

      case ma_lwma  : return(iLwma(price,(int)length,r,bars,instanceNo));

      default       : return(price);

     }

  }

double workSma[][_maWorkBufferx1];

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

//|                                                                  |

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

double iSma(double price,int period,int r,int _bars,int instanceNo=0)

  {

   if(ArrayRange(workSma,0)!=_bars) ArrayResize(workSma,_bars);

   workSma[r][instanceNo]=price;

   double avg=price;

   int k=1;

   for(; k<period && (r-k)>=0; k++) avg+=workSma[r-k][instanceNo];

   return(avg/(double)k);

  }

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

//|                                                                  |

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

double workEma[][_maWorkBufferx1];

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

//|                                                                  |

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

double iEma(double price,double period,int r,int _bars,int instanceNo=0)

  {

   if(ArrayRange(workEma,0)!=_bars) ArrayResize(workEma,_bars);

   workEma[r][instanceNo]=price;

   if(r>0 && period>1)

      workEma[r][instanceNo]=workEma[r-1][instanceNo]+(2.0/(1.0+period))*(price-workEma[r-1][instanceNo]);

   return(workEma[r][instanceNo]);

  }

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

//|                                                                  |

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

double workSmma[][_maWorkBufferx1];

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

//|                                                                  |

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

double iSmma(double price,double period,int r,int _bars,int instanceNo=0)

  {

   if(ArrayRange(workSmma,0)!=_bars) ArrayResize(workSmma,_bars);

   workSmma[r][instanceNo]=price;

   if(r>1 && period>1)

      workSmma[r][instanceNo]=workSmma[r-1][instanceNo]+(price-workSmma[r-1][instanceNo])/period;

   return(workSmma[r][instanceNo]);

  }

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

//|                                                                  |

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

double workLwma[][_maWorkBufferx1];

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

//|                                                                  |

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

double iLwma(double price,double period,int r,int _bars,int instanceNo=0)

  {

   if(ArrayRange(workLwma,0)!=_bars) ArrayResize(workLwma,_bars);



   workLwma[r][instanceNo] = price; if(period<1) return(price);

   double sumw = period;

   double sum  = period*price;

   for(int k=1; k<period && (r-k)>=0; k++)

     {

      double weight=period-k;

      sumw  += weight;

      sum   += weight*workLwma[r-k][instanceNo];

     }

   return(sum/sumw);

  }

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