//+------------------------------------------------------------------+
//| SB_PivotPoints.mq4 - free indicator by StockBook                 |
//| https://stockbook.blvis.in                                        |
//+------------------------------------------------------------------+
#property copyright "StockBook"
#property link      "https://stockbook.blvis.in"
#property version   "1.00"
#property description "Classic daily pivot points (Pivot, R1, R2, S1, S2). For analysis only, not investment advice."
#property strict
#property indicator_chart_window
#property indicator_buffers 5
#property indicator_color1 clrGold
#property indicator_color2 clrTomato
#property indicator_color3 clrTomato
#property indicator_color4 clrLimeGreen
#property indicator_color5 clrLimeGreen

double PP[],R1[],R2[],S1[],S2[];

int OnInit()
{
   SetIndexBuffer(0,PP); SetIndexBuffer(1,R1); SetIndexBuffer(2,R2);
   SetIndexBuffer(3,S1); SetIndexBuffer(4,S2);
   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,1);
   for(int k=1;k<5;k++) SetIndexStyle(k,DRAW_LINE,STYLE_DOT,1);
   SetIndexLabel(0,"Pivot"); SetIndexLabel(1,"R1"); SetIndexLabel(2,"R2");
   SetIndexLabel(3,"S1");    SetIndexLabel(4,"S2");
   IndicatorShortName("SB Pivot Points");
   return(INIT_SUCCEEDED);
}

int start()
{
   int counted=IndicatorCounted();
   if(counted<0) return(-1);
   int limit=Bars-counted;
   if(counted>0) limit++;
   if(limit>Bars) limit=Bars;
   for(int i=0;i<limit;i++)
   {
      int d=iBarShift(NULL,PERIOD_D1,Time[i],false)+1;
      double h=iHigh(NULL,PERIOD_D1,d);
      double l=iLow(NULL,PERIOD_D1,d);
      double c=iClose(NULL,PERIOD_D1,d);
      if(h==0 || l==0 || c==0)
      {
         PP[i]=EMPTY_VALUE; R1[i]=EMPTY_VALUE; R2[i]=EMPTY_VALUE;
         S1[i]=EMPTY_VALUE; S2[i]=EMPTY_VALUE;
         continue;
      }
      double p=(h+l+c)/3.0;
      PP[i]=p;
      R1[i]=2.0*p-l;  S1[i]=2.0*p-h;
      R2[i]=p+(h-l);  S2[i]=p-(h-l);
   }
   return(0);
}