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  // Test pour éviter même magicNumber sur Chaque Symbol
   int UniqueMagicNumber = ReturnMagicNumberOfOpenTrade();
   
   if (UniqueMagicNumber == 0)
   {
   UniqueMagicNumber = WindowHandle(Symbol(),0);
   TrendMagicNumber = UniqueMagicNumber;
   CtMagicNumber    = UniqueMagicNumber+1;
   }
   else
   {
   TrendMagicNumber = UniqueMagicNumber;
   CtMagicNumber    = UniqueMagicNumber+1;
   }

   if (TrendMagicNumber == 0)  TrendMagicNumber=837746;
   if (CtMagicNumber == 0)  TrendMagicNumber=837747;
   
   Alert(Symbol()+" MN Trend = "+TrendMagicNumber+" MN CT Trend = "+CtMagicNumber);

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int ReturnMagicNumberOfOpenTrade()
{

   if (OrdersTotal() == 0) return(0);
   
   for (int cc = OrdersTotal() - 1; cc >= 0; cc--)
   {
      if (!OrderSelect(cc, SELECT_BY_POS, MODE_TRADES) ) continue;
      if (OrderSymbol() != Symbol() ) continue;
      
      return(OrderMagicNumber());
   }  //for (int cc = OrdersTotal() - 1; cc >= 0; cc--)  
   return(0);
} // int ReturnMagicNumberOfOpenTrade(MySymbol : string)

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bool CountOpenTrades()
{
   //Not all these will be needed. Which ones are depends on the individual EA.
   OpenTrades = 0;
   TicketNo = -1;
   BuyOpen = false;
   SellOpen = false;
   PendingBuyOpen = false;
   PendingSellOpen = false;
   int type;//Saves the OrderType() for consulatation later in the function
   TradeHasPartClosed=false;
   
   upl = 0;//Unrealised profit and loss for hedging/recovery basket closure decisions

   if (OrdersTotal() == 0) return(true);
   
   //Define a variable to avoid the situation that Phil describes at http://www.stevehopwoodforex.com/phpBB3/viewtopic.php?p=92449#p92449
   double ot = OrdersTotal();
   
   //Iterating backwards through the orders list caters more easily for closed trades than iterating forwards
   for (int cc = OrdersTotal() - 1; cc >= 0; cc--)
   {
      if (ot != OrdersTotal() )
         return(false);
         
      bool TradeWasClosed = false;//See 'check for possible trade closure'

      //Ensure the trade is still open
      if (!OrderSelect(cc, SELECT_BY_POS, MODE_TRADES) ) continue;
      //Ensure the EA 'owns' this trade
      if (OrderSymbol() != Symbol() ) continue;
      if (OrderMagicNumber() != TrendMagicNumber) 
         if (OrderMagicNumber() != CtMagicNumber) 
            continue;
      if (OrderCloseTime() > 0) continue; 
      
      //All conditions passed, so carry on
      type = OrderType();//Store the order type
      
      OpenTrades++;
      //Store the latest trade sent. Most of my EA's only need this final ticket number as either they are single trade
      //bots or the last trade in the sequence is the important one. Adapt this code for your own use.
      if (TicketNo  == -1) TicketNo = OrderTicket();
      
      //upl might not be needed. Depends on the individual EA
      upl+= (OrderProfit() + OrderSwap() + OrderCommission()); 
      //The next line of code calculates the pips upl of an open trade. As yet, I have done nothing with it.
      //something = CalculateTradeProfitInPips()
      
      //These might need extra coding if both stop and limit orders are used
      if (OrderType() == OP_BUYSTOP || OrderType() == OP_BUYLIMIT) PendingBuyOpen = true;
      if (OrderType() == OP_SELLSTOP || OrderType() == OP_SELLLIMIT) PendingSellOpen = true;
      //Add missing tp/sl in case rapidly moving markets prevent their addition - ECN
      if (CloseEnough(OrderStopLoss(), 0) && !CloseEnough(StopLoss, 0)) InsertStopLoss(OrderTicket());
      if (CloseEnough(OrderTakeProfit(), 0) && !CloseEnough(TakeProfit, 0)) InsertTakeProfit(OrderTicket() );

      //Replace missing tp and sl lines
      if (HiddenPips > 0) ReplaceMissingSlTpLines();
      
      
      TradeWasClosed = LookForTradeClosure(OrderTicket() );
      if (TradeWasClosed) 
      {
         if (type == OP_BUY) BuyOpen = false;//Will be reset if subsequent trades are buys that are not closed
         if (type == OP_SELL) SellOpen = false;//Will be reset if subsequent trades are sells that are not closed
         cc++;
         continue;
      }//if (TradeWasClosed) 
         
      //Profitable trade management
      if (OrderProfit() > 0) 
      {
         TradeManagementModule();
         if (TradeHasPartClosed) continue;//Part-closing changes the ticket number, so we cannot continue the current loop iteration
      }//if (OrderProfit() > 0) 
            
      //Trade types and half-close, and adjust sl/tp in case slippage has caused them to be inaccurate when the trade was sent.
      if (OrderType() == OP_BUY) 
      {
         BuyOpen = true;
         if (PartCloseEnabled && OrderComment() == TradeComment && OrderStopLoss() >= OrderOpenPrice() ) PartCloseTrade(OrderTicket() );
      }//if (OrderType() == OP_BUY) 
      
      if (OrderType() == OP_SELL) 
      {
         SellOpen = true;
         if (PartCloseEnabled && OrderComment() == TradeComment && OrderStopLoss() <= OrderOpenPrice()  && !CloseEnough(OrderStopLoss(), 0)) PartCloseTrade(OrderTicket() );
      }//if (OrderType() == OP_SELL) 
      
   }//for (int cc = OrdersTotal() - 1; cc <= 0; c`c--)
   
   //Loop exited correctly, so tell the rest of the code
   return(true);
   
}//End bool CountOpenTrades();

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if (!CountOpenTrades() )
      return(0);