Reversing a Position in Hedging Mode Gives Invalid Volume When Used With The Position ID

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Say I have a long position of 0.01 which I want to reverse hence I sell 0.02.


I sent the an opposite order with the position ID so as to have the reversed position also to have the same ID.


I get invalid volume error. 


  1. How do I rectify this error?
  2. Can I retain the same position ID ticket for the reversed position?
 
1. Show your code.
2. No, you cannot.


 
Suminda Dharmasena :


    If your account type is "Hedging Account", You have two options:

    1. OR close the position "BUY 0.01" and open the position "SELL 0.01"
    2. OR open  "SELL 0.02" position and then back close
     
    Vladimir Karputov #:

    If your account type is "Hedging Account", You have two options:

    1. OR close the position "BUY 0.01" and open the position "SELL 0.01"
    2. OR open  "SELL 0.02" position and then back close

    How do I back close a position in option 2 in the above response?

    A follow up question.

    Say I have BUY 0.02 and I do a SELL 0.01.

    1. Can I have the same position ID? 
    2. Can I partly back close the portion I sold?
      1. If I partly close will I get a new position ID?

    Again thanks Vladimir and Dominik for the help.

     
    Dominik Christian Egert #:
    1. Show your code.
    2. No, you cannot.


    Code:


    //+------------------------------------------------------------------+
//| Buy using OrderSendAsync() asynchronous function                 |
//+------------------------------------------------------------------+
bool BuyMarketAsync(const ulong position, const double volume, const double sl = 0, const double tp = 0, const ulong deviation = 10, const string comment = "Buy async", const ulong magic = 0)
  {
   if(position == 0 || !PositionSelectByTicket(position))
     {
      Print(__FILE__, ":", __LINE__, " | ", __FUNCSIG__, ": cannot select ", position);
      return(false);
     }
   const string symbol = PositionGetString(POSITION_SYMBOL);
//--- prepare the request
   MqlTradeRequest req = {};
   req.action      = TRADE_ACTION_DEAL;
   req.symbol      = symbol;
   req.position    = position;
   req.magic       = magic;
   req.volume      = volume;
   req.type        = ORDER_TYPE_BUY;
   req.price       = SymbolInfoDouble(req.symbol, SYMBOL_ASK);
   req.sl          = sl;
   req.tp          = tp;
   req.deviation   = deviation;
   req.comment     = comment;
   MqlTradeResult  res = {};
   if(!OrderSendAsync(req, res))
     {
      Print(__FILE__, ":", __LINE__, " | ", __FUNCSIG__, ": error - ", ErrCode(GetLastError()), ", retcode = ", RetCode(res.retcode));
      //--- then display the string description of the handled request
      Print("------------RequestDescription\r\n",
            RequestDescription(req, true), ":~");
      //--- and show description of the request result
      Print("------------ ResultDescription\r\n",
            TradeResultDescription(res, true), ":~");
      return(false);
     }
//---
   return(true);
  }
//+------------------------------------------------------------------+
//| Buy using OrderSendAsync() asynchronous function                 |
//+------------------------------------------------------------------+
bool BuyMarketAsync(const string symbol, const double volume, const double sl = 0, const double tp = 0, const ulong deviation = 10, const string comment = "Buy async", const ulong magic = 0)
  {
   ulong position;
   if(PositionSelect(symbol))
     {
      position = PositionGetInteger(POSITION_TICKET);
     }
   else
     {
      position = 0;
     }
//--- prepare the request
   MqlTradeRequest req = {};
   req.action      = TRADE_ACTION_DEAL;
   req.symbol      = symbol;
   req.position    = position;
   req.magic       = magic;
   req.volume      = volume;
   req.type        = ORDER_TYPE_BUY;
   req.price       = SymbolInfoDouble(req.symbol, SYMBOL_ASK);
   req.sl          = sl;
   req.tp          = tp;
   req.deviation   = deviation;
   req.comment     = comment;
   MqlTradeResult  res = {};
   if(!OrderSendAsync(req, res))
     {
      Print(__FILE__, ":", __LINE__, " | ", __FUNCSIG__, ": error - ", ErrCode(GetLastError()), ", retcode = ", RetCode(res.retcode));
      //--- then display the string description of the handled request
      Print("------------RequestDescription\r\n",
            RequestDescription(req, true), ":~");
      //--- and show description of the request result
      Print("------------ ResultDescription\r\n",
            TradeResultDescription(res, true), ":~");
      return(false);
     }
//---
   return(true);
  }
//+------------------------------------------------------------------+
//| Sell using OrderSendAsync() asynchronous function                |
//+------------------------------------------------------------------+
bool SellMarketAsync(const ulong position, const double volume, const double sl = 0, const double tp = 0, const ulong deviation = 10, const string comment = "Sell async", const ulong magic = 0)
  {
   if(position == 0 || !PositionSelectByTicket(position))
     {
      Print(__FILE__, ":", __LINE__, " | ", __FUNCSIG__, ": cannot select ", position);
      return(false);
     }
   const string symbol = PositionGetString(POSITION_SYMBOL);
//--- prepare the request
   MqlTradeRequest req = {};
   req.action      = TRADE_ACTION_DEAL;
   req.symbol      = symbol;
   req.position    = position;
   req.magic       = magic;
   req.volume      = volume;
   req.type        = ORDER_TYPE_SELL;
   req.price       = SymbolInfoDouble(req.symbol, SYMBOL_BID);
   req.sl          = sl;
   req.tp          = tp;
   req.deviation   = deviation;
   req.comment     = comment;
   MqlTradeResult  res = {};
   if(!OrderSendAsync(req, res))
     {
      Print(__FILE__, ":", __LINE__, " | ", __FUNCSIG__, ": error - ", ErrCode(GetLastError()), ", retcode = ", RetCode(res.retcode));
      //--- then display the string description of the handled request
      Print("------------RequestDescription\r\n",
            RequestDescription(req, true), ":~");
      //--- and show description of the request result
      Print("------------ ResultDescription\r\n",
            TradeResultDescription(res, true), ":~");
      return(false);
     }
//---
   return(true);
  }
//+------------------------------------------------------------------+
//| Sell using OrderSendAsync() asynchronous function                |
//+------------------------------------------------------------------+
bool SellMarketAsync(const string symbol, const double volume, const double sl = 0, const double tp = 0, const ulong deviation = 10, const string comment = "Sell async", const ulong magic = 0)
  {
   ulong position;
   if(PositionSelect(symbol))
     {
      position = PositionGetInteger(POSITION_TICKET);
     }
   else
     {
      position = 0;
     }
//--- prepare the request
   MqlTradeRequest req = {};
   req.action      = TRADE_ACTION_DEAL;
   req.symbol      = symbol;
   req.position    = position;
   req.magic       = magic;
   req.volume      = volume;
   req.type        = ORDER_TYPE_SELL;
   req.price       = SymbolInfoDouble(req.symbol, SYMBOL_BID);
   req.sl          = sl;
   req.tp          = tp;
   req.deviation   = deviation;
   req.comment     = comment;
   MqlTradeResult  res = {};
   if(!OrderSendAsync(req, res))
     {
      Print(__FILE__, ":", __LINE__, " | ", __FUNCSIG__, ": error - ", ErrCode(GetLastError()), ", retcode = ", RetCode(res.retcode));
      //--- then display the string description of the handled request
      Print("------------RequestDescription\r\n",
            RequestDescription(req, true), ":~");
      //--- and show description of the request result
      Print("------------ ResultDescription\r\n",
            TradeResultDescription(res, true), ":~");
      return(false);
     }
//---
   return(true);
  }
     
    Suminda Dharmasena # :

    How do I back close a position in option 2 in the above response?

    A follow up question.

    Say I have BUY 0.02 and I do a SELL 0.01.

    1. Can I have the same position ID? 
    2. Can I partly back close the portion I sold?
      1. If I partly close will I get a new position ID?

    I am using CTrade trading class, PositionCloseBy method:

    Closes a position with the specified ticket by an opposite position.

    bool  PositionCloseBy(
   const ulong   ticket,        // position ticket
   const ulong   ticket_by      // opposite position ticket
   )
    Documentation on MQL5: Standard Library / Trade Classes / CTrade / PositionCloseBy
    Documentation on MQL5: Standard Library / Trade Classes / CTrade / PositionCloseBy
    • www.mql5.com
    PositionCloseBy(const ulong,const ulong) - CTrade - Trade Classes - Standard Library - MQL5 Reference - Reference on algorithmic/automated trading language for MetaTrader 5
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