#property indicator_chart_window
extern int    NumberOfDays = 50; 
extern string Begin_1      = "08:00";
extern string End_1        = "17:00";
extern color  Color_1      = Yellow;
extern string Begin_2      = "13:00";
extern string End_2        = "22:00";
extern color  Color_2      = DarkBlue;
extern bool   HighRange    = True;


void init() {
  DeleteObjects();
  for (int i=0; i<NumberOfDays; i++) {
    CreateObjects("PWT1"+i, Color_1);
    CreateObjects("PWT2"+i, Color_2);
  }
  Comment("");
}

void deinit() {
  DeleteObjects();
  Comment("");
}

void CreateObjects(string no, color cl) {
  ObjectCreate(no, OBJ_RECTANGLE, 0, 0,0, 0,0);
  ObjectSet(no, OBJPROP_STYLE, STYLE_SOLID);
  ObjectSet(no, OBJPROP_COLOR, cl);
  ObjectSet(no, OBJPROP_BACK, True);
}

void DeleteObjects() {
  for (int i=0; i<NumberOfDays; i++) {
    ObjectDelete("PWT1"+i);
    ObjectDelete("PWT2"+i);
  }
}

void start() {
  datetime dt=CurTime();

  for (int i=0; i<NumberOfDays; i++) {
    DrawObjects(dt, "PWT1"+i, Begin_1, End_1);
    DrawObjects(dt, "PWT2"+i, Begin_2, End_2);
    dt=decDateTradeDay(dt);
    while (TimeDayOfWeek(dt)>5) dt=decDateTradeDay(dt);
  }
}

void DrawObjects(datetime dt, string no, string tb, string te) {
  datetime t1, t2;
  double   p1, p2;
  int      b1, b2;

  t1=StrToTime(TimeToStr(dt, TIME_DATE)+" "+tb);
  t2=StrToTime(TimeToStr(dt, TIME_DATE)+" "+te);
  b1=iBarShift(NULL, 0, t1);
  b2=iBarShift(NULL, 0, t2);
  p1=High[Highest(NULL, 0, MODE_HIGH, b1-b2, b2)];
  p2=Low [Lowest (NULL, 0, MODE_LOW , b1-b2, b2)];
  if (!HighRange) {p1=0; p2=2*p2;}
  ObjectSet(no, OBJPROP_TIME1 , t1);
  ObjectSet(no, OBJPROP_PRICE1, p1);
  ObjectSet(no, OBJPROP_TIME2 , t2);
  ObjectSet(no, OBJPROP_PRICE2, p2);
}

datetime decDateTradeDay (datetime dt) {
  int ty=TimeYear(dt);
  int tm=TimeMonth(dt);
  int td=TimeDay(dt);
  int th=TimeHour(dt);
  int ti=TimeMinute(dt);

  td--;
  if (td==0) {
    tm--;
    if (tm==0) {
      ty--;
      tm=12;
    }
    if (tm==1 || tm==3 || tm==5 || tm==7 || tm==8 || tm==10 || tm==12) td=31;
    if (tm==2) if (MathMod(ty, 4)==0) td=29; else td=28;
    if (tm==4 || tm==6 || tm==9 || tm==11) td=30;
  }
  return(StrToTime(ty+"."+tm+"."+td+" "+th+":"+ti));
}

