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//+------------------------------------------------------------------+
//|                                        ModularMultiStrategy.mq5  |
//|                                  Copyright 2026, Financial Algo  |
//|                                             https://mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026"
#property link      "https://mql5.com"
#property version   "1.00"
#property strict

//--- Include Trade Library
#include <Trade\Trade.mqh>
CTrade trade;

//--- Strategy Enumeration
enum ENUM_STRATEGY
  {
   STRATEGY_TREND_MA     = 0, // 1. Trend Following (Moving Average Cross)
   STRATEGY_MEAN_REV_RSI = 1, // 2. Mean Reversion (RSI Overbought/Oversold)
   STRATEGY_BREAKOUT_CH  = 2  // 3. Price Breakout (Highest/Lowest Channel)
  };

//--- Input Parameters
input group "=== CORE STRATEGY CONTROLLER ==="
input ENUM_STRATEGY InpStrategy = STRATEGY_TREND_MA; // Active Execution Strategy

input group "=== RISK & POSITION MANAGEMENT ==="
input double        InpLotSize   = 0.1;               // Trade Volume (Lots)
input int           InpStopLoss  = 200;               // Stop Loss in Points (0 = Disabled)
input int           InpTakeProfit = 400;              // Take Profit in Points (0 = Disabled)
input ulong         InpMagicNumber = 888111;          // Unique Magic Identification Number

input group "=== PARAMETERS: STRATEGY 1 (MA CROSS) ==="
input int           InpFastMAPeriod = 10;             // Fast Moving Average Period
input int           InpSlowMAPeriod = 20;             // Slow Moving Average Period

input group "=== PARAMETERS: STRATEGY 2 (RSI REVERSION) ==="
input int           InpRSIPeriod    = 14;             // RSI Period
input double        InpRSIOverbought = 70.0;          // RSI Upper Bound (Sell Zone)
input double        InpRSIOversold   = 30.0;          // RSI Lower Bound (Buy Zone)

input group "=== PARAMETERS: STRATEGY 3 (CHANNEL BREAKOUT) ==="
input int           InpChannelPeriod = 20;            // Number of Bars for Price Range

//--- Global Variables for Indicator Handles
int fastMAHandle, slowMAHandle, rsiHandle;

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
   // Set the identity footprint for orders executed by this engine instances
   trade.SetExpertMagicNumber(InpMagicNumber);
   
   // Initialize structural indicator pipelines based on user strategy selection
   if(InpStrategy == STRATEGY_TREND_MA)
     {
      fastMAHandle = iMA(_Symbol, _Period, InpFastMAPeriod, 0, MODE_SMA, PRICE_CLOSE);
      slowMAHandle = iMA(_Symbol, _Period, InpSlowMAPeriod, 0, MODE_SMA, PRICE_CLOSE);
      if(fastMAHandle == INVALID_HANDLE || slowMAHandle == INVALID_HANDLE) return(INIT_FAILED);
     }
   else if(InpStrategy == STRATEGY_MEAN_REV_RSI)
     {
      rsiHandle = iRSI(_Symbol, _Period, InpRSIPeriod, PRICE_CLOSE);
      if(rsiHandle == INVALID_HANDLE) return(INIT_FAILED);
     }
     
   return(INIT_SUCCEEDED);
  }

//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
   // Free system performance memory allocations
   IndicatorRelease(fastMAHandle);
   IndicatorRelease(slowMAHandle);
   IndicatorRelease(rsiHandle);
  }

//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
   // Restrict logic evaluation to the formation of a fresh candlestick
   static datetime lastBarTime;
   datetime currentBarTime = iTime(_Symbol, _Period, 0);
   if(currentBarTime == lastBarTime) return;
   lastBarTime = currentBarTime;

   // Enforce clean execution setup by processing signals only when no trades are open
   if(PositionsTotal() > 0) return;

   // Structural Execution Routers
   switch(InpStrategy)
     {
      case STRATEGY_TREND_MA:     EvaluateMACross();     break;
      case STRATEGY_MEAN_REV_RSI: EvaluateRSIReversion(); break;
      case STRATEGY_BREAKOUT_CH:  EvaluateBreakout();    break;
     }
  }

//+------------------------------------------------------------------+
//| Core Strategy Engine 1: Moving Average Intersection Module       |
//+------------------------------------------------------------------+
void EvaluateMACross()
  {
   double fastMA[], slowMA[];
   ArraySetAsSeries(fastMA, true);
   ArraySetAsSeries(slowMA, true);

   if(CopyBuffer(fastMAHandle, 0, 1, 2, fastMA) < 2 || CopyBuffer(slowMAHandle, 0, 1, 2, slowMA) < 2) return;

   // Bullish crossover detected (Fast cross over Slow)
   if(fastMA[0] > slowMA[0] && fastMA[1] <= slowMA[1])
     {
      ExecuteOrder(ORDER_TYPE_BUY);
     }
   // Bearish crossover detected (Fast cross under Slow)
   else if(fastMA[0] < slowMA[0] && fastMA[1] >= slowMA[1])
     {
      ExecuteOrder(ORDER_TYPE_SELL);
     }
  }

//+------------------------------------------------------------------+
//| Core Strategy Engine 2: RSI Exhaustion Bounds Module             |
//+------------------------------------------------------------------+
void EvaluateRSIReversion()
  {
   double rsiValues[];
   ArraySetAsSeries(rsiValues, true);

   if(CopyBuffer(rsiHandle, 0, 1, 2, rsiValues) < 2) return;

   // Price recovering out of oversold territory
   if(rsiValues[0] > InpRSIOversold && rsiValues[1] <= InpRSIOversold)
     {
      ExecuteOrder(ORDER_TYPE_BUY);
     }
   // Price correcting out of overbought territory
   else if(rsiValues[0] < InpRSIOverbought && rsiValues[1] >= InpRSIOverbought)
     {
      ExecuteOrder(ORDER_TYPE_SELL);
     }
  }

//+------------------------------------------------------------------+
//| Core Strategy Engine 3: Multi-Bar Structural Range Breakout     |
//+------------------------------------------------------------------+
void EvaluateBreakout()
  {
   // Identify high and low boundaries across the historical lookback range
   int highestBar = iHighest(_Symbol, _Period, MODE_HIGH, InpChannelPeriod, 1);
   int lowestBar  = iLowest(_Symbol, _Period, MODE_LOW, InpChannelPeriod, 1);

   double channelHigh = iHigh(_Symbol, _Period, highestBar);
   double channelLow  = iLow(_Symbol, _Period, lowestBar);

   double closeCurrent = iClose(_Symbol, _Period, 1);

   // Close price broke cleanly out above the historical channel ceiling
   if(closeCurrent > channelHigh)
     {
      ExecuteOrder(ORDER_TYPE_BUY);
     }
   // Close price broke cleanly out below the historical channel floor
   else if(closeCurrent < channelLow)
     {
      ExecuteOrder(ORDER_TYPE_SELL);
     }
  }

//+------------------------------------------------------------------+
//| Secure Order Execution Module                                    |
//+------------------------------------------------------------------+
void ExecuteOrder(ENUM_ORDER_TYPE type)
  {
   double price = (type == ORDER_TYPE_BUY) ? SymbolInfoDouble(_Symbol, SYMBOL_ASK) : SymbolInfoDouble(_Symbol, SYMBOL_BID);
   double sl = 0;
   double tp = 0;

   if(type == ORDER_TYPE_BUY)
     {
      sl = (InpStopLoss > 0) ? price - (InpStopLoss * _Point) : 0;
      tp = (InpTakeProfit > 0) ? price + (InpTakeProfit * _Point) : 0;
      trade.Buy(InpLotSize, _Symbol, price, sl, tp, "Modular Multi-Strategy Engine [BUY]");
     }
   else if(type == ORDER_TYPE_SELL)
     {
      sl = (InpStopLoss > 0) ? price + (InpStopLoss * _Point) : 0;
      tp = (InpTakeProfit > 0) ? price - (InpTakeProfit * _Point) : 0;
      trade.Sell(InpLotSize, _Symbol, price, sl, tp, "Modular Multi-Strategy Engine [SELL]");
     }
  }
//+------------------------------------------------------------------+

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