//+------------------------------------------------------------------+
//|                                Indicator: Stochastic(Signal).mq4 |
//|                                       Created with EABuilder.com |
//|                                             http://eabuilder.com |
//+------------------------------------------------------------------+
#property copyright "Created with EABuilder.com"
#property link      "http://eabuilder.com"
#property version   "1.00"
#property description ""

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

//--- indicator settings
#property indicator_chart_window
#property indicator_buffers 2

#property indicator_type1 DRAW_ARROW
#property indicator_width1 1
#property indicator_color1 0xFF0000
#property indicator_label1 "Signal Buy"

#property indicator_type2 DRAW_ARROW
#property indicator_width2 1
#property indicator_color2 0x0000FF
#property indicator_label2 "Signal Sell"

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

extern int Trend_Factor = 136;
extern int Slow_Factor = 27;
extern double Signal_OS = 10;
extern int OB_OS_Factor = 4;
extern double Signal_OB = 90;
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+" | Stochastic(Signal) @ "+Symbol()+","+Period()+" | "+message);
     }
   else if(type == "order")
     {
     }
   else if(type == "modify")
     {
     }
   else if(type == "indicator")
     {
      if(Audible_Alerts) Alert(type+" | Stochastic(Signal) @ "+Symbol()+","+Period()+" | "+message);
      if(Send_Email) SendMail("Stochastic(Signal)", type+" | Stochastic(Signal) @ "+Symbol()+","+Period()+" | "+message);
      if(Push_Notifications) SendNotification(type+" | Stochastic(Signal) @ "+Symbol()+","+Period()+" | "+message);
     }
  }

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {   
   IndicatorBuffers(2);
   SetIndexBuffer(0, Buffer1);
   SetIndexEmptyValue(0, 0);
   SetIndexArrow(0, 241);
   SetIndexBuffer(1, Buffer2);
   SetIndexEmptyValue(1, 0);
   SetIndexArrow(1, 242);
   //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);
   //--- initial zero
   if(prev_calculated < 1)
     {
      ArrayInitialize(Buffer1, 0);
      ArrayInitialize(Buffer2, 0);
     }
   else
      limit++;
   
   //--- main loop
   for(int i = limit-1; i >= 0; i--)
     {
      if (i >= MathMin(50000-1, rates_total-1-50)) continue; //omit some old rates to prevent "Array out of range" or slow calculation   
      //Indicator Buffer 1
      if(iStochastic(NULL, PERIOD_CURRENT, Trend_Factor, 1, Slow_Factor, MODE_SMA, 0, MODE_MAIN, i) >= 50 //Stochastic Oscillator >= fixed value
      && iStochastic(NULL, PERIOD_CURRENT, Slow_Factor, 1, OB_OS_Factor, MODE_SMA, 1, MODE_MAIN, i) < Signal_OS //Stochastic Oscillator < fixed value
      )
        {
         Buffer1[i] = Low[i]; //Set indicator value at Candlestick Low
         if(i == 0 && Time[0] != time_alert) { myAlert("indicator", "Signal Buy"); time_alert = Time[0]; } //Instant alert, only once per bar
        }
      else
        {
         Buffer1[i] = 0;
        }
      //Indicator Buffer 2
      if(iStochastic(NULL, PERIOD_CURRENT, Trend_Factor, 1, Slow_Factor, MODE_SMA, 0, MODE_MAIN, i) <= 50 //Stochastic Oscillator <= fixed value
      && iStochastic(NULL, PERIOD_CURRENT, Slow_Factor, 1, OB_OS_Factor, MODE_SMA, 1, MODE_MAIN, i) > Signal_OB //Stochastic Oscillator > fixed value
      )
        {
         Buffer2[i] = High[i] + iATR(NULL, PERIOD_CURRENT, 14, i); //Set indicator value at Candlestick High + Average True Range
         if(i == 0 && Time[0] != time_alert) { myAlert("indicator", "Signal Sell"); time_alert = Time[0]; } //Instant alert, only once per bar
        }
      else
        {
         Buffer2[i] = 0;
        }
     }
   return(rates_total);
  }
//+------------------------------------------------------------------+