//+------------------------------------------------------------------+
//|                                                       Warrior_EA |
//|                                                     AnimateDread |
//|                                                                  |
//+------------------------------------------------------------------+
#include <Expert\ExpertMoney.mqh>
class CExpertMoneyCustom : public CExpertMoney
  {
protected:
   bool              CheckAndCorrectVolumeValue(double &volume, string &description);
   bool              CheckAndAdjustMoneyForTrade(string symb, double &lots, ENUM_ORDER_TYPE type);
  };
//+------------------------------------------------------------------+
//| Check and correct the order volume to the nearest valid value   |
//+------------------------------------------------------------------+
bool CExpertMoneyCustom::CheckAndCorrectVolumeValue(double &volume, string &description)
  {
//--- minimal allowed volume for trade operations
   double min_volume = SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_MIN);
   if(volume < min_volume)
     {
      volume = min_volume; // Adjust to the minimum valid volume
      description = StringFormat("Adjusted volume to the minimal allowed SYMBOL_VOLUME_MIN=%.2f", min_volume);
     }
//--- maximal allowed volume of trade operations
   double max_volume = SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_MAX);
   if(volume > max_volume)
     {
      volume = max_volume; // Adjust to the maximum valid volume
      description = StringFormat("Adjusted volume to the maximal allowed SYMBOL_VOLUME_MAX=%.2f", max_volume);
     }
//--- get minimal step of volume changing
   double volume_step = SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_STEP);
   int ratio = (int)MathRound(volume / volume_step);
   volume = ratio * volume_step; // Correct to the nearest valid step
   description = "Volume adjusted to a valid value";
   return(true);
  }
//+------------------------------------------------------------------+
//| Check and adjust the trade size based on available margin       |
//+------------------------------------------------------------------+
bool CExpertMoneyCustom::CheckAndAdjustMoneyForTrade(string symb, double &lots, ENUM_ORDER_TYPE type)
  {
   MqlTick mqltick;
   SymbolInfoTick(symb, mqltick);
   double price = (type == ORDER_TYPE_SELL) ? mqltick.bid : mqltick.ask;
   double margin, free_margin = AccountInfoDouble(ACCOUNT_MARGIN_FREE);
   if(!OrderCalcMargin(type, symb, lots, price, margin))
     {
      Print("Error calculating margin: ", GetLastError());
      return(false);
     }
   while(margin > free_margin && lots > 0)
     {
      lots -= 0.01; // Decrease lots by the smallest possible increment
      if(!OrderCalcMargin(type, symb, lots, price, margin) || lots <= 0)
        {
         Print("Unable to adjust lots to fit free margin.");
         return(false);
        }
     }
   if(lots <= 0)
     {
      Print("Adjusted lots size is too small for a trade.");
      return(false);
     }
// If the code reaches this point, the lots size has been successfully adjusted
   return(true);
  }
//+------------------------------------------------------------------+