#property version   "1.00"
#property description ""


#include <stdlib.mqh>
#include <stderror.mqh>

//--- indicator settings
#property indicator_separate_window
#property indicator_buffers 3

#property indicator_type1 DRAW_HISTOGRAM
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1
#property indicator_color1 0xFFAA00
#property indicator_label1 "above"

#property indicator_type2 DRAW_HISTOGRAM
#property indicator_style2 STYLE_SOLID
#property indicator_width2 1
#property indicator_color2 0x0000FF
#property indicator_label2 "below"

#property indicator_type3 DRAW_HISTOGRAM
#property indicator_style3 STYLE_SOLID
#property indicator_width3 1
#property indicator_color3 0x85827B
#property indicator_label3 "inside"

extern int Average_period = 5;
extern int Limit_Bars = 2000;


//--- indicator buffers
double Buffer1[];
double Buffer2[];
double Buffer3[];

datetime time_alert; //used when sending alert
bool Send_Email = true;
bool Audible_Alerts = true;
bool Push_Notifications = true;
double myPoint; //initialized in OnInit

void myAlert(string type, string message)
  {
   if(type == "print")
      Print(message);
   else if(type == "error")
     {
      Print(type+Symbol()+","+IntegerToString(Period())+" | "+message);
     }
   else if(type == "order")
     {
     }
   else if(type == "modify")
     {
     }
   else if(type == "indicator")
     {
      Print(Symbol()+","+IntegerToString(Period())+" | "+message);
      if(Audible_Alerts) Alert(Symbol()+","+IntegerToString(Period())+" | "+message);

      if(Push_Notifications) SendNotification(Symbol()+","+IntegerToString(Period())+" | "+message);
     }
  }

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {   
   IndicatorBuffers(3);
   SetIndexBuffer(0, Buffer1);
   SetIndexEmptyValue(0, EMPTY_VALUE);
   SetIndexBuffer(1, Buffer2);
   SetIndexEmptyValue(1, EMPTY_VALUE);
   SetIndexBuffer(2, Buffer3);
   SetIndexEmptyValue(2, EMPTY_VALUE);
   //initialize myPoint
   myPoint = Point();
   if(Digits() == 5 || Digits() == 3)
     {
      myPoint *= 10;
     }
   return(INIT_SUCCEEDED);
  }

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime& time[],
                const double& open[],
                const double& high[],
                const double& low[],
                const double& close[],
                const long& tick_volume[],
                const long& volume[],
                const int& spread[])
  {
   int limit = rates_total - prev_calculated;
   //--- counting from 0 to rates_total
   ArraySetAsSeries(Buffer1, true);
   ArraySetAsSeries(Buffer2, true);
   ArraySetAsSeries(Buffer3, true);
   //--- initial zero
   if(prev_calculated < 1)
     {
      ArrayInitialize(Buffer1, EMPTY_VALUE);
      ArrayInitialize(Buffer2, EMPTY_VALUE);
      ArrayInitialize(Buffer3, EMPTY_VALUE);
     }
   else
      limit++;
   
   //--- main loop
   for(int i = limit-1; i >= 0; i--)
     {
      if (i >= MathMin(5000-1, rates_total-1-50)) continue; //omit some old rates to prevent "Array out of range" or slow calculation   
      
      //Indicator Buffer 1
      if(Close[i] > iCustom(NULL, PERIOD_CURRENT, "Advanced_Fractal_Envelopes", Average_period, true, true, Limit_Bars, 0, i) //Candlestick Close > Advanced_Fractal_Envelopes
      )
        {
        
         Buffer1[i] = Close[i]; //Set indicator value at Candlestick Close
         
         if (Close[i+1] < iCustom(NULL, PERIOD_CURRENT, "Advanced_Fractal_Envelopes", Average_period, true, true, Limit_Bars, 0, i+1)){
         if(i == 1 && Time[1] != time_alert) myAlert("indicator", "Fractal Channel - UP"); //Alert on next bar open
         time_alert = Time[1];}
         
     
        }
      else
        {
         Buffer1[i] = EMPTY_VALUE;
        }
      //Indicator Buffer 2
      if(Close[i] < iCustom(NULL, PERIOD_CURRENT, "Advanced_Fractal_Envelopes", Average_period, true, true, Limit_Bars, 1, i) //Candlestick Close < Advanced_Fractal_Envelopes
      )
        {
         Buffer2[i] = Close[i]; //Set indicator value at Candlestick Close
         
         if (Close[i+1] > iCustom(NULL, PERIOD_CURRENT, "Advanced_Fractal_Envelopes", Average_period, true, true, Limit_Bars, 1, i+1)){
         if(i == 1 && Time[1] != time_alert) myAlert("indicator", "Fractal Channel - DOWN"); //Alert on next bar open
         time_alert = Time[1];}
        
        }
      else
        {
         Buffer2[i] = EMPTY_VALUE;
        }
      //Indicator Buffer 3
      if(Close[i] <= iCustom(NULL, PERIOD_CURRENT, "Advanced_Fractal_Envelopes", Average_period, true, true, Limit_Bars, 0, i) //Candlestick Close <= Advanced_Fractal_Envelopes
      && Close[i] >= iCustom(NULL, PERIOD_CURRENT, "Advanced_Fractal_Envelopes", Average_period, true, true, Limit_Bars, 1, i) //Candlestick Close >= Advanced_Fractal_Envelopes
      )
        {
         Buffer3[i] = Close[i]; //Set indicator value at Candlestick Close

        }
      else
        {
         Buffer3[i] = EMPTY_VALUE;
        }
     }
   return(rates_total);
  }
//+------------------------------------------------------------------+