Ichimoku_Signals_and_Alerts

#property version "1.1"

#property description "Signals and Alerts given by crossing of Price with components of the Ichimoku:"
#property description "- Kijun-sen with Price"
#property description "- Senkou span A with Price"
#property description "- Senkou span B with Price"
#property description "- Tenkan-sen with Kijun-sen"
#property description "- Senkou span A with Senkou span B"

#property indicator_chart_window

#property  indicator_buffers 12
#property indicator_color1  clrLime
#property indicator_color2  clrRed
#property indicator_color3  clrLime
#property indicator_color4  clrRed
#property indicator_color5  clrLime
#property indicator_color6  clrRed
#property indicator_color7  clrLime
#property indicator_color8  clrRed
#property indicator_color9  clrLime
#property indicator_color10  clrRed
#property indicator_color11  clrLime
#property indicator_color12  clrRed

#property indicator_width1  2
#property indicator_width2  2
#property indicator_width3  2
#property indicator_width4  2
#property indicator_width5  2
#property indicator_width6  2
#property indicator_width7  2
#property indicator_width8  2
#property indicator_width9  2
#property indicator_width10  2
#property indicator_width11  2
#property indicator_width12  2

extern int  Tenkan_Sen_Period                = 9;
extern int  Kijun_Sen_Period                 = 26;
extern int  Senkou_Span_B_Period             = 52;
extern bool Show_Kijun_Sen                   = true;
extern bool Show_Senkou_Span_A               = true;
extern bool Show_Senkou_Span_B               = true;
extern bool Show_Tenkan_Sen_Kijun_Sen        = true;
extern bool Show_Senkou_Span_A_Senkou_Span_B = true;

extern string   AlertsSection            = ""; // == Alerts ==
extern bool     Popup_Alert              = true; // Popup message
extern bool     Notification_Alert       = false; // Push notification
extern bool     Email_Alert              = false; // Email
extern bool     Play_Sound               = false; // Play sound on alert
extern string   Sound_File               = ""; // Sound file
extern bool     Advanced_Alert           = false; // Advanced alert
extern string   Advanced_Key             = ""; // Advanced alert key
extern string   Comment2                 = "- You can get a advanced alert key by starting a dialog with @profit_robots_bot Telegram bot -";
extern string   Comment3                 = "- Allow use of dll in the indicator parameters window -";
extern string   Comment4                 = "- Install AdvancedNotificationsLib.dll -";

#import "AdvancedNotificationsLib.dll"
void AdvancedAlert(string key, string text, string instrument, string timeframe);
#import

#define ENTER_BUY_SIGNAL 1
#define ENTER_SELL_SIGNAL -1
#define EXIT_BUY_SIGNAL 2
#define EXIT_SELL_SIGNAL -2

class Signaler
{
   string _symbol;
   ENUM_TIMEFRAMES _timeframe;
   datetime _lastDatetime;
public:
   Signaler(const string symbol, ENUM_TIMEFRAMES timeframe)
   {
      _symbol = symbol;
      _timeframe = timeframe;
   }

   void SendNotifications(const int direction)
   {
      if (direction == 0)
         return;

      datetime currentTime = iTime(_symbol, _timeframe, 0);
      if (_lastDatetime == currentTime)
         return;

      _lastDatetime = currentTime;
      string tf = GetTimeframe();
      string alert_Subject;
      string alert_Body;
      switch (direction)
      {
         case ENTER_BUY_SIGNAL:
            alert_Subject = "Buy signal on " + _symbol + "/" + tf;
            alert_Body = "Buy signal on " + _symbol + "/" + tf;
            break;
         case ENTER_SELL_SIGNAL:
            alert_Subject = "Sell signal on " + _symbol + "/" + tf;
            alert_Body = "Sell signal on " + _symbol + "/" + tf;
            break;
         case EXIT_BUY_SIGNAL:
            alert_Subject = "Exit buy signal on " + _symbol + "/" + tf;
            alert_Body = "Exit buy signal on " + _symbol + "/" + tf;
            break;
         case EXIT_SELL_SIGNAL:
            alert_Subject = "Exit sell signal on " + _symbol + "/" + tf;
            alert_Body = "Exit sell signal on " + _symbol + "/" + tf;
            break;
      }
      SendNotifications(alert_Subject, alert_Body, _symbol, tf);
   }

   void SendNotifications(const string subject, string message = NULL, string symbol = NULL, string timeframe = NULL)
   {
      if (message == NULL)
         message = subject;
      if (symbol == NULL)
         symbol = _symbol;
      if (timeframe == NULL)
         timeframe = GetTimeframe();

      if (Popup_Alert)
         Alert(message);
      if (Email_Alert)
         SendMail(subject, message);
      if (Play_Sound)
         PlaySound(Sound_File);
      if (Notification_Alert)
         SendNotification(message);
      if (Advanced_Alert && Advanced_Key != "" && !IsTesting())
         AdvancedAlert(Advanced_Key, message, symbol, timeframe);
   }

private:
   string GetTimeframe()
   {
      switch (_timeframe)
      {
         case PERIOD_M1: return "M1";
         case PERIOD_M5: return "M5";
         case PERIOD_D1: return "D1";
         case PERIOD_H1: return "H1";
         case PERIOD_H4: return "H4";
         case PERIOD_M15: return "M15";
         case PERIOD_M30: return "M30";
         case PERIOD_MN1: return "MN1";
         case PERIOD_W1: return "W1";
      }
      return "M1";
   }
};

datetime LastAlert;

double K

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