Ranbow WMA

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

#property copyright   "© mladen, 2018"

#property link        "mladenfx@gmail.com"

#property description "Rainbow WMA"

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

#property indicator_chart_window

#property indicator_buffers 4

#property indicator_plots   1

#property indicator_label1  "Rainbow WMA"

#property indicator_type1   DRAW_COLOR_LINE

#property indicator_color1  clrDarkGray,clrSandyBrown,clrDodgerBlue

#property indicator_width1  2

//--- input parameters

input int                inpPeriod    = 5;            // Period

input int                inpRwmaDepth = 10;           // RWMA depth (maximal 50)

input ENUM_APPLIED_PRICE inpPrice     = PRICE_MEDIAN; // Price

//--- indicator buffers

double val[],valc[];

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

//| Custom indicator initialization function                         | 

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

int OnInit()

  {

//--- indicator buffers mapping

   SetIndexBuffer(0,val,INDICATOR_DATA);

   SetIndexBuffer(1,valc,INDICATOR_COLOR_INDEX);

//--- indicator short name assignment

   IndicatorSetString(INDICATOR_SHORTNAME,"Rainbow WMA ("+(string)inpPeriod+")");

//---

   return (INIT_SUCCEEDED);

  }

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

//| Custom indicator de-initialization function                      |

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

void OnDeinit(const int reason)

  {

  }

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

//| Custom indicator iteration function                              |

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

#define MAX_depth 50

double pBuffer[][MAX_depth];

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(prev_calculated);

   if (ArrayRange(pBuffer,0) != rates_total) ArrayResize(pBuffer,rates_total);

   double _weight = (inpPeriod+1)*inpPeriod*0.5;

   int    _depth  = MathMax(MathMin(inpRwmaDepth,50),1);

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

     {

         double price = getPrice(inpPrice,open,close,high,low,i,rates_total);;

         double coeff = 5;

         double sum   = 0;

         double sumc  = 0;

         for (int k=0,j; k<_depth; k++)

         {

            pBuffer[i][k] = price;

            if (i>inpPeriod)

            {

               for (j=0,price=0; j<inpPeriod; j++) price += (inpPeriod-j)*pBuffer[i-j][k];

                                                   price /= _weight;

            }

            sum  += coeff*price;

            sumc += coeff;

            coeff = MathMax(coeff-1,1);

         }

      val[i] = sum/sumc;

      valc[i] = (i>0) ? (val[i]>val[i-1]) ? 2 : (val[i]<val[i-1]) ? 1 : valc[i-1] : 0;

     }

   return(rates_total);

  }

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

//| Custom functions                                                 |

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

double getPrice(ENUM_APPLIED_PRICE tprice,const double &open[],const double &close[],const double &high[],const double &low[],int i,int _bars)

  {

   if(i>=0)

      switch(tprice)

        {

         case PRICE_CLOSE:     return(close[i]);

         case PRICE_OPEN:      return(open[i]);

         case PRICE_HIGH:      return(high[i]);

         case PRICE_LOW:       return(low[i]);

         case PRICE_MEDIAN:    return((high[i]+low[i])/2.0);

         case PRICE_TYPICAL:   return((high[i]+low[i]+close[i])/3.0);

         case PRICE_WEIGHTED:  return((high[i]+low[i]+close[i]+close[i])/4.0);

        }

   return(0);

  }

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