Timers, Events, and Alerts

//+------------------------------------------------------------------+
//| Lesson 16 - Timers, trade events, chart events, notifications    |
//+------------------------------------------------------------------+
#property copyright "Strategist Academy"
#property version   "1.00"
#property strict

input int TimerSeconds = 60;

int OnInit()
{
   EventSetTimer(TimerSeconds);
   Print("Timer set to ", TimerSeconds, "s. Press 'B' on the chart to send a test alert.");
   return(INIT_SUCCEEDED);
}

void OnDeinit(const int reason)
{
   EventKillTimer();          // always - a stray timer is a nasty bug
   Comment("");               // clear the on-chart dashboard
}

//+------------------------------------------------------------------+
//| Time-based work: runs whether or not the market is moving        |
//+------------------------------------------------------------------+
void OnTimer()
{
   double bid    = SymbolInfoDouble(_Symbol, SYMBOL_BID);
   double equity = AccountInfoDouble(ACCOUNT_EQUITY);
   double free   = AccountInfoDouble(ACCOUNT_MARGIN_FREE);

   Comment("Lesson 16 dashboard",
           "\nSymbol:  ", _Symbol,
           "\nBid:     ", DoubleToString(bid, _Digits),
           "\nEquity:  ", DoubleToString(equity, 2),
           "\nFree:    ", DoubleToString(free, 2),
           "\nPositions: ", PositionsTotal(),
           "\nUpdated: ", TimeToString(TimeCurrent(), TIME_SECONDS));
}

//+------------------------------------------------------------------+
//| Fires when anything trade-related happens on the account         |
//+------------------------------------------------------------------+
void OnTrade()
{
   Print("Trade event. Positions total: ", PositionsTotal(),
         "   orders: ", OrdersTotal());

   // React, but do not place new orders from in here - set a flag instead.
   if(PositionSelect(_Symbol))
   {
      double sl = PositionGetDouble(POSITION_SL);
      double tp = PositionGetDouble(POSITION_TP);
      Print("Position on ", _Symbol,
            "  type=", (PositionGetInteger(POSITION_TYPE) == POSITION_TYPE_BUY ? "BUY" : "SELL"),
            "  volume=", DoubleToString(PositionGetDouble(POSITION_VOLUME), 2),
            "  sl=", DoubleToString(sl, _Digits),
            "  tp=", DoubleToString(tp, _Digits));
   }
}

//+------------------------------------------------------------------+
//| Keyboard and object interaction                                  |
//+------------------------------------------------------------------+
void OnChartEvent(const int id,
                  const long   &lparam,
                  const double &dparam,
                  const string &sparam)
{
   if(id == CHARTEVENT_KEYDOWN)
   {
      if(lparam == 66)   // 'B'
      {
         double bid = SymbolInfoDouble(_Symbol, SYMBOL_BID);
         string msg = _Symbol + " manual check at " + DoubleToString(bid, _Digits);

         Alert(msg);
         Print("Alert raised: ", msg);

         // Requires push notifications enabled in terminal settings.
         if(!SendNotification(msg))
            Print("SendNotification failed - enable push notifications in terminal options.");
      }
   }
}