//+------------------------------------------------------------------+
//|                                             DailyPivotPoints.mq4 |
//|                      Copyright © 2005, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Blue
#property indicator_color2 Red
//---- input parameters
extern int       ExtFormula=0;
extern int       ExtHowManyDays=30;
extern bool      ExtDraw=true;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexEmptyValue(0,0.0);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexEmptyValue(1,0.0);
//---- clear buffers when reinitializing
   if(ArraySize(ExtMapBuffer1)>0) ArrayInitialize(ExtMapBuffer1,0.0);
   if(ArraySize(ExtMapBuffer2)>0) ArrayInitialize(ExtMapBuffer2,0.0);
//---- set labels for DataWindow
   if(ExtDraw)
     {
      if(ExtFormula==0)
        {
         SetIndexLabel(0,"Pivot");
         SetIndexLabel(1,NULL);
        }
       else
        {
         SetIndexLabel(0,"Resistance");
         SetIndexLabel(1,"Support");
        }
     }
    else
     {
      SetIndexLabel(0,NULL);
      SetIndexLabel(1,NULL);
     }
//---- force daily data load
   iBars(NULL,PERIOD_D1);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- deleting our lines
   ObjectDelete("Pivot_Line");
   ObjectDelete("R0.5_Line");
   ObjectDelete("R1.0_Line");
   ObjectDelete("R1.5_Line");
   ObjectDelete("R2.0_Line");
   ObjectDelete("R2.5_Line");
   ObjectDelete("R3.0_Line");
   ObjectDelete("S0.5_Line");
   ObjectDelete("S1.0_Line");
   ObjectDelete("S1.5_Line");
   ObjectDelete("S2.0_Line");
   ObjectDelete("S2.5_Line");
   ObjectDelete("S3.0_Line");
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int    counted_bars=IndicatorCounted();
   int    begin_bar, first_bar, last_bar, cnt;
   double yesterday_high, yesterday_low, yesterday_close, today_open;
   double P, S, R, S05, R05, S10, R10, S15, R15, S20, R20, S25, R25, S30, R30;
//---- test parameters
   if(ExtFormula<0 || ExtFormula>3) return(-1);
   if(Period()>=PERIOD_D1)          return(-1);
//---- if daily data not loaded yet
   while(true)
     {
      if(iTime(NULL,PERIOD_D1,0)>=(Time[0]-PERIOD_D1*60)) break;
      Sleep(1000);
     }
//---- set check beginning
   if(ExtHowManyDays<1) begin_bar=iBars(NULL,PERIOD_D1)-2;
   else                 begin_bar=ExtHowManyDays-1;
//---- case of recounting current pivot only
   if(ExtDraw==false || counted_bars>0) begin_bar=0;
//----
   for(cnt=begin_bar; cnt>=0; cnt--)
     {
      yesterday_close=iClose(NULL,PERIOD_D1,cnt+1);
      today_open=iOpen(NULL,PERIOD_D1,cnt);
      yesterday_high=iHigh(NULL,PERIOD_D1,cnt+1);
      yesterday_low=iLow(NULL,PERIOD_D1,cnt+1);
      P = (yesterday_high + yesterday_low + yesterday_close + today_open) / 4;
      switch(ExtFormula)
        {
         case 1 :
            R = P + P - yesterday_low;
            S = P + P - yesterday_high;
            break;
         case 2 :
            R = P + yesterday_high - yesterday_low;
            S = P - yesterday_high + yesterday_low;
            break;
         case 3 :
            R = P + P - yesterday_low - yesterday_low + yesterday_high;
            S = P + P - yesterday_high - yesterday_high + yesterday_low;		
        }
      if(ExtDraw==true)
        {
         first_bar=iBarShift(NULL,0,iTime(NULL,PERIOD_D1,cnt))-1;
         if(cnt>0) last_bar=iBarShift(NULL,0,iTime(NULL,PERIOD_D1,cnt-1))-1;
         else last_bar=0;
         while(first_bar>=last_bar)
           {
            if(first_bar==last_bar && last_bar>0) break;
            if(ExtFormula==0) ExtMapBuffer1[first_bar]=P;
            else
              {
               ExtMapBuffer1[first_bar]=R;
               ExtMapBuffer2[first_bar]=S;
              }
             first_bar--;
           }
        }
     }
   P = NormalizeDouble((yesterday_high + yesterday_low + yesterday_close)/3,Digits);

   R10 = NormalizeDouble((2*P)-yesterday_low,Digits);
   S10 = NormalizeDouble((2*P)-yesterday_high,Digits);

   R05 = NormalizeDouble((P+R10)/2,Digits);
   S05 = NormalizeDouble((P+S10)/2,Digits);

   R20 = NormalizeDouble(P+(yesterday_high-yesterday_low),Digits);
   S20 = NormalizeDouble(P-(yesterday_high-yesterday_low),Digits);

   R15 = NormalizeDouble((R10+R20)/2,Digits);
   S15 = NormalizeDouble((S10+S20)/2,Digits);

   R30 = NormalizeDouble(2*P+(yesterday_high-2*yesterday_low),Digits);
   S30 = NormalizeDouble(2*P-(2*yesterday_high-yesterday_low),Digits);		

   R25 = NormalizeDouble((R20+R30)/2,Digits);
   S25 = NormalizeDouble((S20+S30)/2,Digits);

   ObjectCreate("Pivot_Line", OBJ_HLINE, 0, 0, P);
   ObjectSet("Pivot_Line", OBJPROP_COLOR, Yellow);
   ObjectSet("Pivot_Line", OBJPROP_STYLE, STYLE_SOLID);
   ObjectSetText("Pivot_Line","Pivot "+DoubleToStr(P,Digits));

   ObjectCreate("R0.5_Line", OBJ_HLINE, 0, 0, R05);
   ObjectSet("R0.5_Line", OBJPROP_COLOR, GreenYellow);
   ObjectSet("R0.5_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("R0.5_Line","R0.5 "+DoubleToStr(R05,Digits));

   ObjectCreate("R1.0_Line", OBJ_HLINE, 0, 0, R10);
   ObjectSet("R1.0_Line", OBJPROP_COLOR, YellowGreen);
   ObjectSet("R1.0_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("R1.0_Line","R1.0 "+DoubleToStr(R10,Digits));

   ObjectCreate("R1.5_Line", OBJ_HLINE, 0, 0, R15);
   ObjectSet("R1.5_Line", OBJPROP_COLOR, GreenYellow);
   ObjectSet("R1.5_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("R1.5_Line","R1.5 "+DoubleToStr(R15,Digits));

   ObjectCreate("R2.0_Line", OBJ_HLINE, 0, 0, R20);
   ObjectSet("R2.0_Line", OBJPROP_COLOR, YellowGreen);
   ObjectSet("R2.0_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("R2.0_Line","R2.0 "+DoubleToStr(R20,Digits));

   ObjectCreate("R2.5_Line", OBJ_HLINE, 0, 0, R25);
   ObjectSet("R2.5_Line", OBJPROP_COLOR, GreenYellow);
   ObjectSet("R2.5_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("R2.5_Line","R2.5 "+DoubleToStr(R25,Digits));

   ObjectCreate("R3.0_Line", OBJ_HLINE, 0, 0, R30);
   ObjectSet("R3.0_Line", OBJPROP_COLOR, YellowGreen);
   ObjectSet("R3.0_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("R3.0_Line","R3.0 "+DoubleToStr(R30,Digits));

   ObjectCreate("S0.5_Line", OBJ_HLINE, 0, 0, S05);
   ObjectSet("S0.5_Line", OBJPROP_COLOR, Salmon);
   ObjectSet("S0.5_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("S0.5_Line","S0.5 "+DoubleToStr(S05,Digits));

   ObjectCreate("S1.0_Line", OBJ_HLINE, 0, 0, S10);
   ObjectSet("S1.0_Line", OBJPROP_COLOR, Salmon);
   ObjectSet("S1.0_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("S1.0_Line","S1.0 "+DoubleToStr(S10,Digits));

   ObjectCreate("S1.5_Line", OBJ_HLINE, 0, 0, S15);
   ObjectSet("S1.5_Line", OBJPROP_COLOR, Salmon);
   ObjectSet("S1.5_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("S1.5_Line","S1.5 "+DoubleToStr(S15,Digits));

   ObjectCreate("S2.0_Line", OBJ_HLINE, 0, 0, S20);
   ObjectSet("S2.0_Line", OBJPROP_COLOR, Salmon);
   ObjectSet("S2.0_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("S2.0_Line","S2.0 "+DoubleToStr(S20,Digits));

   ObjectCreate("S2.5_Line", OBJ_HLINE, 0, 0, S25);
   ObjectSet("S2.5_Line", OBJPROP_COLOR, Salmon);
   ObjectSet("S2.5_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("S2.5_Line","S2.5 "+DoubleToStr(S25,Digits));

   ObjectCreate("S3.0_Line", OBJ_HLINE, 0, 0, S30);
   ObjectSet("S3.0_Line", OBJPROP_COLOR, Salmon);
   ObjectSet("S3.0_Line", OBJPROP_STYLE, STYLE_DOT);
   ObjectSetText("S3.0_Line","S3.0 "+DoubleToStr(S30,Digits));
//---- force objects drawing
   ObjectsRedraw();
//----
   return(0);
  }
//+------------------------------------------------------------------+