MQLArticles/PosMgmt/ConditionalPartial/Base/ConstantPartial.mqh

//+------------------------------------------------------------------+
//|                                              ConstantPartial.mqh |
//|                                  Copyright 2025, Niquel Mendoza. |
//|                     https://www.mql5.com/es/users/nique_372/news |
//+------------------------------------------------------------------+
#property copyright "Copyright 2025, Niquel Mendoza."
#property link      "https://www.mql5.com/es/users/nique_372/news"
#property strict

#ifndef MQLARTICLES_POSMGMT_CONDPARTIALS_BASE_CONSTPARTIALS_MQH
#define MQLARTICLES_POSMGMT_CONDPARTIALS_BASE_CONSTPARTIALS_MQH


//+------------------------------------------------------------------+
//| Include                                                          |
//+------------------------------------------------------------------+
#include "Base.mqh"

//+---------------------------------------------------------------------+
//| Class for implementing constant partial closes.                     |
//| (A single percentage that will be closed partially from the trade)  |
//+---------------------------------------------------------------------+
class CConditionalPartialsConst : public CConditionalPartials
 {
private:
  // Variable that indicates to the class if it should force the trade close even if the lot to be partially closed
  // is less than the minimum volume
  bool               m_forze_to_close;

public:
                     CConditionalPartialsConst::CConditionalPartialsConst() : m_forze_to_close(false) {}

  //--- General
  void               ClosePartialsForBuyPositions()  override;
  void               ClosePartialsForSellPositions() override;

  //--- Force to close setter and getter
  bool               ForzeToClose() const { return m_forze_to_close; }
  void               ForzeToClose(bool new_val) { m_forze_to_close = new_val; }
 };

//+------------------------------------------------------------------+
//| Function that iterates over all positions to track (buy)         |
//| and partially closes the trade                                   |
//+------------------------------------------------------------------+
void CConditionalPartialsConst::ClosePartialsForBuyPositions(void)
 {
//--- Resize to zero
  ::ArrayResize(m_indexes_to_remove, 0, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE);

//--- Iteration
  for(int i = 0; i < m_tracked_positions_size; i++)
   {
    if(m_tracked_positions_arr[i].type == POSITION_TYPE_SELL || m_symbol_bid < m_tracked_positions_arr[i].next_min_price)
      continue;

    if(!::PositionSelectByTicket(m_tracked_positions_arr[i].ticket))
     {
      // "Delete"
      AddArrayNoVerification2(m_indexes_to_remove, i, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE)
#ifdef CONDITIONAL_PARTIAL_CONST_MORE_INFO
      LogError(::StringFormat("Ticket selection failed %I64u", m_tracked_positions_arr[i].ticket), FUNCION_ACTUAL);
#endif
      continue;
     }

    //---
    m_tracked_positions_arr[i].next_min_price += m_min_distance_value;

    //--- Initial calculation
    const double lot_size = ::PositionGetDouble(POSITION_VOLUME);
    double volume_to_close =  m_volumes_to_close_arr[0] * lot_size;

    //--- Check min volume to close
    if(volume_to_close < m_symbol_min_volume)
     {
      if(m_forze_to_close)
       {
        volume_to_close = lot_size;
       }
      else
       {
        //--- Log
        LogWarning(::StringFormat("Partial close %d, of position %I64u skipped, volume to close %.*f is less than minimum volume %.*f",
                                  0,
                                  m_tracked_positions_arr[i].ticket,
                                  m_symbol_digits,
                                  volume_to_close,
                                  m_symbol_digits,
                                  m_symbol_min_volume), FUNCION_ACTUAL);

        //--- "Delete"
        AddArrayNoVerification2(m_indexes_to_remove, i, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE)
        continue;
       }
     }

    //--- Round
    volume_to_close = RoundToStep(volume_to_close, m_symbol_volume_step);

#ifdef CONDITIONAL_PARTIAL_CONST_MORE_INFO
    LogInfo(::StringFormat("Partially closing %.2f lots of position %I64u", volume_to_close, m_tracked_positions_arr[i].ticket), FUNCION_ACTUAL);
#endif

    //--- Close
    m_trade.PositionClosePartial(m_tracked_positions_arr[i].ticket, volume_to_close);
   }

//--- Multiple remove
  m_tracked_positions_size =  RemoveMultipleIndexes(m_tracked_positions_arr, m_indexes_to_remove, CONDITIONAL_PARTIAL_ARR_MAIN_RESERVE);
 }

//+------------------------------------------------------------------+
//| Function that iterates over all positions to track (sell)        |
//| and partially closes the trade                                   |
//+------------------------------------------------------------------+
void CConditionalPartialsConst::ClosePartialsForSellPositions(void)
 {
//--- Resize to zero
  ::ArrayResize(m_indexes_to_remove, 0, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE);

//--- Iteration
  for(int i = 0; i < m_tracked_positions_size; i++)
   {
    if(m_tracked_positions_arr[i].type == POSITION_TYPE_BUY || m_symbol_ask > m_tracked_positions_arr[i].next_min_price)
      continue;

    if(!::PositionSelectByTicket(m_tracked_positions_arr[i].ticket))
     {
      // "Delete"
      AddArrayNoVerification2(m_indexes_to_remove, i, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE)
#ifdef CONDITIONAL_PARTIAL_CONST_MORE_INFO
      LogError(::StringFormat("Ticket selection failed %I64u", m_tracked_positions_arr[i].ticket), FUNCION_ACTUAL);
#endif
      continue;
     }

    //---
    m_tracked_positions_arr[i].next_min_price -= m_min_distance_value;

    //--- Initial calculation
    const double lot_size = ::PositionGetDouble(POSITION_VOLUME);
    double volume_to_close =  m_volumes_to_close_arr[0] * lot_size;

    //--- Check min volume to close
    if(volume_to_close < m_symbol_min_volume)
     {
      if(m_forze_to_close)
       {
        volume_to_close = lot_size;
       }
      else
       {
        //--- Log
        LogWarning(::StringFormat("Partial close %d, of position %I64u skipped, volume to close %.*f is less than minimum volume %.*f",
                                  0,
                                  m_tracked_positions_arr[i].ticket,
                                  m_symbol_digits,
                                  volume_to_close,
                                  m_symbol_digits,
                                  m_symbol_min_volume), FUNCION_ACTUAL);

        //--- "Delete"
        AddArrayNoVerification2(m_indexes_to_remove, i, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE)
        continue;
       }
     }

    //--- Round
    volume_to_close = RoundToStep(volume_to_close, m_symbol_volume_step);

#ifdef CONDITIONAL_PARTIAL_CONST_MORE_INFO
    LogInfo(::StringFormat("Partially closing %.2f lots of position %I64u", volume_to_close, m_tracked_positions_arr[i].ticket), FUNCION_ACTUAL);
#endif

    //--- Close
    m_trade.PositionClosePartial(m_tracked_positions_arr[i].ticket, volume_to_close);
   }

//--- Multiple remove
  m_tracked_positions_size = RemoveMultipleIndexes(m_tracked_positions_arr, m_indexes_to_remove, CONDITIONAL_PARTIAL_ARR_MAIN_RESERVE);
 }


//+------------------------------------------------------------------+
//+------------------------------------------------------------------+
#endif // MQLARTICLES_POSMGMT_CONDPARTIALS_BASE_CONSTPARTIALS_MQH