i-Sessions_v3

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Author: ��� ����� �. aka KimIV
i-Sessions_v3

The logic of this script is designed to provide a clear visual map of global trading sessions directly on your price chart. It automates the process of identifying and highlighting specific periods of market activity, allowing traders to see historical and current session boundaries at a glance.

Core Functionality

Session Identification and Visualization The tool identifies three primary global trading sessions: Asia, Europe, and the USA. For each session, you can define specific start and end times (e.g., 00:00 to 09:00 for Asia). The script then draws colored rectangular blocks on your chart to represent these timeframes. This helps users instantly distinguish between different market "moods" or volatility periods throughout a 24-hour cycle.

Historical Tracking The script does not just show the current day; it is designed to look back across a user-defined number of days (defaulting to 21 days). It automatically iterates through previous dates to populate your chart with historical session data, providing a continuous visual timeline of market activity.

High and Low Price Detection Within each specific time window defined for a session, the logic calculates the highest and lowest price points reached during that period. This information is used to:

  • Define the vertical boundaries of the session boxes.
  • Provide key "extreme" price levels for the current day.

Price Labeling The script includes an optional feature to display specific price labels. For the most recent session data, it can automatically place text on the chart indicating the exact high and low prices reached. It specifically calculates the difference between the "Ask" and "Bid" prices to ensure accuracy in showing these levels.

Automated Calendar Logic To ensure the visual history is accurate, the script contains an internal calendar handler. This logic handles complex date transitions—such as moving from one month to another, adjusting for different month lengths (28, 30, or 31 days), and accounting for leap years. It also ensures that the script skips non-trading days (like weekends) to maintain a clean, logical flow of data on your chart.

Key Features for Users

  • Customizable Colors: Each session can be assigned a unique color to help you differentiate between markets visually.
  • Background Transparency: The session blocks are drawn in the background so they do not obscure your price candles or other technical indicators.
  • Dynamic Updates: The script automatically updates its visual elements as time progresses, keeping your chart current with the latest market movements.
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i-Sessions_v3 
//+------------------------------------------------------------------+
//|                                                   i-Sessions.mq4 |
//|                                           Êèì Èãîðü Â. aka KimIV |
//|                                                                  |
//|                                                                  |
//|  16.11.2005  Èíäèêàòîð òîðãîâûõ ñåññèé                           |
//+------------------------------------------------------------------+
#property copyright "Êèì Èãîðü Â. aka KimIV"
#property link      ""

#property indicator_chart_window

//------- Âíåøíèå ïàðàìåòðû èíäèêàòîðà -------------------------------
extern int    NumberOfDays = 21;             // Êîëè÷åñòâî äíåé
extern string AsiaBegin    = "00:00";       // Îòêðûòèå àçèàòñêîé ñåññèè
extern string AsiaEnd      = "09:00";       // Çàêðûòèå àçèàòñêîé ñåññèè
extern color  AsiaColor    = DarkGreen;     // Öâåò àçèàòñêîé ñåññèè
extern string EurBegin     = "08:00";       // Îòêðûòèå åâðîïåéñêîé ñåññèè
extern string EurEnd       = "17:00";       // Çàêðûòèå åâðîïåéñêîé ñåññèè
extern color  EurColor     = DarkSlateGray; // Öâåò åâðîïåéñêîé ñåññèè
extern string USABegin     = "12:30";       // Îòêðûòèå àìåðèêàíñêîé ñåññèè
extern string USAEnd       = "22:00";       // Çàêðûòèå àìåðèêàíñêîé ñåññèè
extern color  USAColor     = Navy;          // Öâåò àìåðèêàíñêîé ñåññèè
extern bool   ShowPrice    = True;          // Ïîêàçûâàòü öåíîâûå óðîâíè
extern color  clFont       = Blue;          // Öâåò øðèôòà
extern int    SizeFont     = 8;             // Ðàçìåð øðèôòà
extern int    OffSet       = 10;            // Ñìåùåíèå


//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
void init() {
  DeleteObjects();
  for (int i=0; i<NumberOfDays; i++) {
    CreateObjects("AS"+i, AsiaColor);
    CreateObjects("EU"+i, EurColor);
    CreateObjects("US"+i, USAColor);
  }
  Comment("");
}

//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
void deinit() {
  DeleteObjects();
  Comment("");
}

//+------------------------------------------------------------------+
//| Ñîçäàíèå îáúåêòîâ èíäèêàòîðà                                     |
//| Ïàðàìåòðû:                                                       |
//|   no - íàèìåíîâàíèå îáúåêòà                                      |
//|   cl - öâåò îáúåêòà                                              |
//+------------------------------------------------------------------+
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);
}

//+------------------------------------------------------------------+
//| Óäàëåíèå îáúåêòîâ èíäèêàòîðà                                     |
//+------------------------------------------------------------------+
void DeleteObjects() {
  for (int i=0; i<NumberOfDays; i++) {
    ObjectDelete("AS"+i);
    ObjectDelete("EU"+i);
    ObjectDelete("US"+i);
  }
  ObjectDelete("ASup");
  ObjectDelete("ASdn");
  ObjectDelete("EUup");
  ObjectDelete("EUdn");
  ObjectDelete("USup");
  ObjectDelete("USdn");
}

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
void start() {
  datetime dt=CurTime();

  for (int i=0; i<NumberOfDays; i++) {
    if (ShowPrice && i==0) {
      DrawPrices(dt, "AS", AsiaBegin, AsiaEnd);
      DrawPrices(dt, "EU", EurBegin, EurEnd);
      DrawPrices(dt, "US", USABegin, USAEnd);
    }
    DrawObjects(dt, "AS"+i, AsiaBegin, AsiaEnd);
    DrawObjects(dt, "EU"+i, EurBegin, EurEnd);
    DrawObjects(dt, "US"+i, USABegin, USAEnd);
    dt=decDateTradeDay(dt);
    while (TimeDayOfWeek(dt)>5) dt=decDateTradeDay(dt);
  }
}

//+------------------------------------------------------------------+
//| Ïðîðèñîâêà îáúåêòîâ íà ãðàôèêå                                   |
//| Ïàðàìåòðû:                                                       |
//|   dt - äàòà òîðãîâîãî äíÿ                                        |
//|   no - íàèìåíîâàíèå îáúåêòà                                      |
//|   tb - âðåìÿ íà÷àëà ñåññèè                                       |
//|   te - âðåìÿ îêîí÷àíèÿ ñåññèè                                    |
//+------------------------------------------------------------------+
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)];
  ObjectSet(no, OBJPROP_TIME1 , t1);
  ObjectSet(no, OBJPROP_PRICE1, p1);
  ObjectSet(no, OBJPROP_TIME2 , t2);
  ObjectSet(no, OBJPROP_PRICE2, p2);
}

//+------------------------------------------------------------------+
//| Ïðîðèñîâêà öåíîâûõ ìåòîê íà ãðàôèêå                              |
//| Ïàðàìåòðû:                                                       |
//|   dt - äàòà òîðãîâîãî äíÿ                                        |
//|   no - íàèìåíîâàíèå îáúåêòà                                      |
//|   tb - âðåìÿ íà÷àëà ñåññèè                                       |
//|   te - âðåìÿ îêîí÷àíèÿ ñåññèè                                    |
//+------------------------------------------------------------------+
void DrawPrices(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 (ObjectFind(no+"up")<0) ObjectCreate(no+"up", OBJ_TEXT, 0, 0,0);
  ObjectSet(no+"up", OBJPROP_TIME1   , t2);
  ObjectSet(no+"up", OBJPROP_PRICE1  , p1+OffSet*Point);
  ObjectSet(no+"up", OBJPROP_COLOR   , clFont);
  ObjectSet(no+"up", OBJPROP_FONTSIZE, SizeFont);
  ObjectSetText(no+"up", DoubleToStr(p1+Ask-Bid, Digits));

  if (ObjectFind(no+"dn")<0) ObjectCreate(no+"dn", OBJ_TEXT, 0, 0,0);
  ObjectSet(no+"dn", OBJPROP_TIME1   , t2);
  ObjectSet(no+"dn", OBJPROP_PRICE1  , p2);
  ObjectSet(no+"dn", OBJPROP_COLOR   , clFont);
  ObjectSet(no+"dn", OBJPROP_FONTSIZE, SizeFont);
  ObjectSetText(no+"dn", DoubleToStr(p2, Digits));
}

//+------------------------------------------------------------------+
//| Óìåíüøåíèå äàòû íà îäèí òîðãîâûé äåíü                            |
//| Ïàðàìåòðû:                                                       |
//|   dt - äàòà òîðãîâîãî äíÿ                                        |
//+------------------------------------------------------------------+
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));
}
//+------------------------------------------------------------------+

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