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//+------------------------------------------------------------------+
//|                                                      MA Bot.mq5  |
//|  Simple Martingale MA-based Trading Bot for Gold (XAUUSD)       |
//+------------------------------------------------------------------+
#include <Trade/Trade.mqh>
CTrade trade;

input int               maPeriod       = 13;
input ENUM_MA_METHOD    maMethod       = MODE_EMA;
input double            tradeGapUSD    = 2.0;
input double            tpInCents      = 20;     // 20 cents
input double            slInCents      = 200;    // 200 cents
input ENUM_TIMEFRAMES   timeframe      = PERIOD_M5;
input double            lot1 = 0.07;
input double            lot2 = 0.10;
input double            lot3 = 0.15;
input double            lot4 = 0.35;

double lotSizes[];

int maHandle;
double lastBuyPrice = 0;
double lastSellPrice = 0;
int buyCount = 0;
int sellCount = 0;

//+------------------------------------------------------------------+
//| Expert initialization                                            |
//+------------------------------------------------------------------+
int OnInit()
{
   maHandle = iMA(_Symbol, timeframe, maPeriod, 0, maMethod, PRICE_CLOSE);
   if(maHandle == INVALID_HANDLE)
   {
      Print("Failed to create MA handle");
      return(INIT_FAILED);
   }
   ArrayResize(lotSizes, 4);
   lotSizes[0] = lot1;
   lotSizes[1] = lot2;
   lotSizes[2] = lot3;
   lotSizes[3] = lot4;
   return(INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
{
   double maBuffer[1];
   if(CopyBuffer(maHandle, 0, 0, 1, maBuffer) <= 0) return;
   double maValue = maBuffer[0];

   double bid = SymbolInfoDouble(_Symbol, SYMBOL_BID);
   double ask = SymbolInfoDouble(_Symbol, SYMBOL_ASK);

   // Buy logic
   if (bid > maValue && buyCount < ArraySize(lotSizes))
   {
      if (buyCount == 0 || MathAbs(bid - lastBuyPrice) >= tradeGapUSD)
      {
         if (trade.Buy(lotSizes[buyCount], _Symbol, ask, 0, 0))
         {
            lastBuyPrice = bid;
            buyCount++;
         }
      }
   }

   // Sell logic
   if (ask < maValue && sellCount < ArraySize(lotSizes))
   {
      if (sellCount == 0 || MathAbs(ask - lastSellPrice) >= tradeGapUSD)
      {
         if (trade.Sell(lotSizes[sellCount], _Symbol, bid, 0, 0))
         {
            lastSellPrice = ask;
            sellCount++;
         }
      }
   }

   ManageRisk();
}

//+------------------------------------------------------------------+
//| Risk Management                                                  |
//+------------------------------------------------------------------+
void ManageRisk()
{
   double totalProfitCents = 0.0;
   for (int i = PositionsTotal() - 1; i >= 0; i--)
   {
      if (PositionGetTicket(i) != 0 && PositionGetString(POSITION_SYMBOL) == _Symbol)
      {
         double profitInCents = PositionGetDouble(POSITION_PROFIT) * 100.0;
         totalProfitCents += profitInCents;
      }
   }

   if (totalProfitCents >= tpInCents)
   {
      CloseAll();
      Print("TP Hit: ", totalProfitCents, " cents");
   }
   else if (totalProfitCents <= -slInCents)
   {
      CloseAll();
      Print("SL Hit: ", totalProfitCents, " cents");
   }
}

//+------------------------------------------------------------------+
//| Close all open positions                                         |
//+------------------------------------------------------------------+
void CloseAll()
{
   for (int i = PositionsTotal() - 1; i >= 0; i--)
   {
      if (PositionGetTicket(i) != 0 && PositionGetString(POSITION_SYMBOL) == _Symbol)
      {
         ulong ticket = PositionGetInteger(POSITION_TICKET);
         trade.PositionClose(ticket);
      }
   }
   buyCount = 0;
   sellCount = 0;
   lastBuyPrice = 0;
   lastSellPrice = 0;
}

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