Opening Range: The Key to Identifying Market Direction

//+------------------------------------------------------------------+
//| Opening Range Breakout EA — Full Framework                       |
//+------------------------------------------------------------------+
#property strict
 
// ── Inputs ─────────────────────────────────────────────────────────
input int    OR_StartHour     = 7;    // Session open hour (GMT)
input int    OR_StartMinute   = 0;    // Session open minute
input int    OR_DurationMins  = 30;   // OR window in minutes
input int    BreakoutBufferPips = 3;  // Pips beyond OR to confirm breakout
input int    MaxEntryHour     = 11;   // No new entries after this hour (GMT)
input double RiskPercent      = 1.0;  // Risk per trade as % of balance
input double TP_Multiplier    = 1.5;  // Take profit = OR width × this value
input bool   UseVolumeFilter  = true; // Require above-average tick volume
input bool   UseTrendFilter   = true; // Only trade in EMA trend direction
input int    TrendEMA_Period  = 50;   // EMA period for trend filter (D1)
 
// ── Globals ────────────────────────────────────────────────────────
double g_orHigh      = 0;
double g_orLow       = 0;
bool   g_orReady     = false;
bool   g_tradedToday = false;
datetime g_lastDay   = 0;
 
int OnInit()
{
   Print("ORB EA initialised. OR window: ", OR_DurationMins, " mins from ",
         OR_StartHour, ":", OR_StartMinute, " GMT");
   return INIT_SUCCEEDED;
}

void OnTick()
{
   datetime now = TimeCurrent();
 
   // ── Reset daily state ────────────────────────────────────────────
   if(TimeDay(now) != TimeDay(g_lastDay))
   {
      g_orHigh      = 0;
      g_orLow       = DBL_MAX;
      g_orReady     = false;
      g_tradedToday = false;
      g_lastDay     = now;
   }
 
   // ── Build Opening Range ──────────────────────────────────────────
   datetime orStart = StringToTime(
      TimeToString(now, TIME_DATE) + " " +
      IntegerToString(OR_StartHour) + ":" +
      IntegerToString(OR_StartMinute));
   datetime orEnd = orStart + OR_DurationMins * 60;
 
   if(!g_orReady)
   {
      if(now < orEnd) // Still inside OR window — track range
      {
         double bid = SymbolInfoDouble(_Symbol, SYMBOL_BID);
         double ask = SymbolInfoDouble(_Symbol, SYMBOL_ASK);
         if(ask > g_orHigh) g_orHigh = ask;
         if(bid < g_orLow)  g_orLow  = bid;
         return;
      }
      g_orReady = true; // OR window has closed
      double width = (g_orHigh - g_orLow) / _Point;
      Print("OR established | High: ", g_orHigh, " | Low: ", g_orLow,
            " | Width: ", width, " pips");
   }
 
   // ── Time filter: no new trades after MaxEntryHour ────────────────
   if(TimeHour(now) >= MaxEntryHour) return;
   if(g_tradedToday) return;
   if(OrdersTotal() > 0) return;
 
   double bid        = SymbolInfoDouble(_Symbol, SYMBOL_BID);
   double ask        = SymbolInfoDouble(_Symbol, SYMBOL_ASK);
   double buffer     = BreakoutBufferPips * _Point;
   double rangeWidth = g_orHigh - g_orLow;
 
   // ── Trend filter (D1 EMA) ────────────────────────────────────────
   double emaValue = 0;
   if(UseTrendFilter)
      emaValue = iMA(_Symbol, PERIOD_D1, TrendEMA_Period, 0,
                     MODE_EMA, PRICE_CLOSE, 0);
 
   // ── Volume filter ────────────────────────────────────────────────
   bool volumeOK = true;
   if(UseVolumeFilter)
   {
      long  curVol = iVolume(_Symbol, PERIOD_M5, 0);
      long  avgVol = 0;
      for(int i = 1; i <= 5; i++)
         avgVol += iVolume(_Symbol, PERIOD_M5, i);
      avgVol /= 5;
      volumeOK = (curVol >= avgVol * 1.5);
   }
 
   // ── Bullish Breakout ─────────────────────────────────────────────
   if(ask > g_orHigh + buffer)
   {
      bool trendOK = !UseTrendFilter || (bid > emaValue);
      if(trendOK && volumeOK)
         PlaceTrade(ORDER_TYPE_BUY, ask, g_orLow - buffer, rangeWidth);
   }
   // ── Bearish Breakdown ────────────────────────────────────────────
   else if(bid < g_orLow - buffer)
   {
      bool trendOK = !UseTrendFilter || (bid < emaValue);
      if(trendOK && volumeOK)
         PlaceTrade(ORDER_TYPE_SELL, bid, g_orHigh + buffer, rangeWidth);
   }
}
 
void PlaceTrade(ENUM_ORDER_TYPE type, double entry,
                double stop, double rangeWidth)
{
   double stopDist = MathAbs(entry - stop);
   double tp       = (type == ORDER_TYPE_BUY)
                     ? entry + rangeWidth * TP_Multiplier
                     : entry - rangeWidth * TP_Multiplier;
 
   // Position sizing based on risk %
   double balance  = AccountBalance();
   double riskAmt  = balance * RiskPercent / 100.0;
   double tickVal  = SymbolInfoDouble(_Symbol, SYMBOL_TRADE_TICK_VALUE);
   double tickSize = SymbolInfoDouble(_Symbol, SYMBOL_TRADE_TICK_SIZE);
   double lots     = NormalizeDouble(
                        riskAmt / (stopDist / tickSize * tickVal), 2);
 
   MqlTradeRequest req = {};
   MqlTradeResult  res = {};
   req.action    = TRADE_ACTION_DEAL;
   req.symbol    = _Symbol;
   req.volume    = lots;
   req.type      = type;
   req.price     = entry;
   req.sl        = stop;
   req.tp        = tp;
   req.deviation = 10;
   req.magic     = 20250101;
   req.comment   = "ORB_EA";
 
   if(OrderSend(req, res))
   {
      g_tradedToday = true;
      Print("Trade placed | Type: ", EnumToString(type),
            " | Lots: ", lots, " | SL: ", stop, " | TP: ", tp);
   }
   else
      Print("Trade failed | Error: ", res.retcode);
}