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mon programme fonctionne en backtest mais pas en réel live

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//+------------------------------------------------------------------+
//|                                                  pyramiding3.mq5 |
//|                                  Copyright 2026, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"


#include <Trade/Trade.mqh>

CTrade trade;




//---------------------- PARAMETRES ---------------------------------
double LotSize           = 0.01;
int    StepPoints        = 30;
ulong  MagicNumber       = 123456;

//---------------------- VARIABLES ----------------------------------
double LastTickPrice = 0;
double LastBuyPrice  = 0;
double LastSellPrice = 0;




//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
   trade.SetExpertMagicNumber(MagicNumber);
   return(INIT_SUCCEEDED);

  }
  
  
  
//+------------------------------------------------------------------+
//| Vérifie s'il existe un achat                                     |
//+------------------------------------------------------------------+
bool HasBuyPosition()
{
   for(int i=0;i<PositionsTotal();i++)
   {
      ulong ticket=PositionGetTicket(i);

      if(PositionSelectByTicket(ticket))
      {
         if(PositionGetString(POSITION_SYMBOL)==_Symbol &&
            PositionGetInteger(POSITION_MAGIC)==MagicNumber &&
            PositionGetInteger(POSITION_TYPE)==POSITION_TYPE_BUY)
            return(true);
      }
   }

   return(false);
}

//+------------------------------------------------------------------+
//| Vérifie s'il existe une vente                                    |
//+------------------------------------------------------------------+
bool HasSellPosition()
{
   for(int i=0;i<PositionsTotal();i++)
   {
      ulong ticket=PositionGetTicket(i);

      if(PositionSelectByTicket(ticket))
      {
         if(PositionGetString(POSITION_SYMBOL)==_Symbol &&
            PositionGetInteger(POSITION_MAGIC)==MagicNumber &&
            PositionGetInteger(POSITION_TYPE)==POSITION_TYPE_SELL)
            return(true);
      }
   }

   return(false);
}

//+------------------------------------------------------------------+
//| Profit total des positions du robot                              |
//+------------------------------------------------------------------+
double TotalProfit()
{
   double profit = 0.0;

   for(int i=0;i<PositionsTotal();i++)
   {
      ulong ticket = PositionGetTicket(i);

      if(PositionSelectByTicket(ticket))
      {
         if(PositionGetString(POSITION_SYMBOL)==_Symbol &&
            PositionGetInteger(POSITION_MAGIC)==MagicNumber)
         {
            profit += PositionGetDouble(POSITION_PROFIT);
         }
      }
   }

   return profit;
}

//+------------------------------------------------------------------+
//| Ferme toutes les positions du robot                              |
//+------------------------------------------------------------------+
void CloseAllPositions()
{
   for(int i=PositionsTotal()-1;i>=0;i--)
   {
      ulong ticket=PositionGetTicket(i);

      if(PositionSelectByTicket(ticket))
      {
         if(PositionGetString(POSITION_SYMBOL)==_Symbol &&
            PositionGetInteger(POSITION_MAGIC)==MagicNumber)
         {
            trade.PositionClose(ticket);
         }
      }
   }

   LastBuyPrice=0;
   LastSellPrice=0;
}  
  
  
  
void TrailingStopAll()
{
   for(int i = PositionsTotal() - 1; i >= 0; i--)
   {
      ulong ticket = PositionGetTicket(i);

      if(!PositionSelectByTicket(ticket))
         continue;

      if(PositionGetString(POSITION_SYMBOL) != _Symbol)
         continue;

      //if(PositionGetInteger(POSITION_MAGIC) != MagicNumber)
        // continue;

      double sl = PositionGetDouble(POSITION_SL);
      double tp = PositionGetDouble(POSITION_TP);
      
      // BUY
      if(PositionGetInteger(POSITION_TYPE) == POSITION_TYPE_BUY)
      {
         double bid = SymbolInfoDouble(_Symbol, SYMBOL_BID);
         double newSL = NormalizeDouble(bid - 30 * _Point, _Digits);
         
         
         
         if(sl==0 || newSL>sl)
            trade.PositionModify(ticket, newSL, tp);
      }

      // SELL
      if(PositionGetInteger(POSITION_TYPE) == POSITION_TYPE_SELL)
      {
         double ask = SymbolInfoDouble(_Symbol, SYMBOL_ASK);
         double newSL = NormalizeDouble(ask + 30 * _Point, _Digits);
         
         
         
         if(sl==0 || newSL<sl)
            trade.PositionModify(ticket, newSL, tp);
      }
   }
}


  
  
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
   
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
//---
   TrailingStopAll();
   
   double bid=SymbolInfoDouble(_Symbol,SYMBOL_BID);
   double ask=SymbolInfoDouble(_Symbol,SYMBOL_ASK);

   if(LastTickPrice==0)
   {
      LastTickPrice=bid;
      return;
   }

   //------------------- TENDANCE HAUSSIERE -------------------------
   if(bid>LastTickPrice)
   {
      // Ferme les ventes si la tendance devient haussière
      if(HasSellPosition())
      {
         //CloseAllPositions();
         LastTickPrice=bid;
         return;
      }

      // Premier achat
      if(!HasBuyPosition())
      {
      
               double lot = 0.01;
               double ask = SymbolInfoDouble(_Symbol, SYMBOL_ASK);
               double sl = NormalizeDouble(ask - 80 * _Point, _Digits); // Stop à 100 points
               
               if(trade.Buy(lot, _Symbol, ask, sl, 0))
                           LastBuyPrice=ask;
      }
      // Achat supplémentaire
      else
      {
         if(ask >= LastBuyPrice + StepPoints*_Point)
         {
               double lot = 0.01;
               double ask = SymbolInfoDouble(_Symbol, SYMBOL_ASK);
               double sl = NormalizeDouble(ask - 80 * _Point, _Digits); // Stop à 100 points
               
               if(trade.Buy(lot, _Symbol, ask, sl, 0))
                           LastBuyPrice=ask;
         }
      }
   }

   //------------------- TENDANCE BAISSIERE -------------------------
   else if(bid<LastTickPrice)
   {
      // Ferme les achats si la tendance devient baissière
      if(HasBuyPosition())
      {
         //CloseAllPositions();
         LastTickPrice=bid;
         return;
      }

      // Première vente
      if(!HasSellPosition())
      {
      
      
      
                     double lot = 0.01;
            double bid = SymbolInfoDouble(_Symbol, SYMBOL_BID);
            double sl = NormalizeDouble(bid + 80 * _Point, _Digits); // Stop à 60 points au-dessus
            
            if(trade.Sell(lot, _Symbol, bid, sl, 0))
               LastSellPrice = bid;
      
      
      
      
      }
      // Vente supplémentaire
      else
      {
         if(bid <= LastSellPrice - StepPoints*_Point)
         {
                           double lot = 0.01;
               double bid = SymbolInfoDouble(_Symbol, SYMBOL_BID);
               double sl = NormalizeDouble(bid + 80 * _Point, _Digits); // Stop à 60 points au-dessus
               
               if(trade.Sell(lot, _Symbol, bid, sl, 0))
                  LastSellPrice = bid;
         }
      }
   }

   LastTickPrice=bid;
}
//+------------------------------------------------------------------+


Pouvez-vous m'aider à comprendre d'où vient l'erreur, pourquoi le programme fonctionne en backtest mais pas en réel live ? 

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