MQLArticles/PosMgmt/ConditionalPartial/Base/Base.mqh

<EFBFBD><EFBFBD>//+------------------------------------------------------------------+
//|                                                         Base.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_BASE_MQH
#define MQLARTICLES_POSMGMT_CONDPARTIALS_BASE_BASE_MQH

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

//+------------------------------------------------------------------+
//| Base class for conditional partials implementation               |
//+------------------------------------------------------------------+
class CConditionalPartials : public CAccountGestor
 {
protected:
  //--- General
  IConditionPartial* m_partial_condition; // Pointer to IConditionPartial, this pointer will give the condition to close buy and sell positions partially
  bool               m_delete_partial_condition_in_dstctor;
  CTrade             m_trade;             // CTrade instance, to apply partial closes

  //--- Tracked Positions
  // Array of ConditionalPartialTrackedPosition type, this array will store the positions
  // To which partial closes will be applied
  ConditionalPartialTrackedPosition m_tracked_positions_arr[];
  int                m_tracked_positions_size; // Number of positions being tracked
  int                m_indexes_to_remove[];    // Indices to be removed from tracked positions array

  //--- Symbol
  string             m_symbol;              // Symbol from which data like min_volume, step, etc. will be obtained
  double             m_symbol_bid;          // Symbol bid
  double             m_symbol_ask;          // Symbol ask
  double             m_symbol_min_volume;   // Minimum volume (opening or closing) for symbol m_symbol
  double             m_symbol_volume_step;  // Volume step for symbol m_symbol
  int8_t             m_symbol_digits;       // Digits of symbol "m_symbol"

  //--- Parameters
  // Boolean that will indicate to the class if when trades are opened (with the magic number, or magic number = 0), they will be added
  // Automatically to the trackable positions array
  bool               m_auto_add_to_tracked_positions;
  CDiff*             m_min_distance_to_close_pos; // Pointer to CDiff, this will give the minimum distance between partial closes
  ulong              m_magic_number;              // Magic number
  double             m_volumes_to_close_arr[];    // Array of percentages, that will close the trades in m_tracked_positions_arr
  int                m_volume_to_close_size;      // Number of partial closes planned for each trade

  //--- Min distance
  double             m_min_distance_value;        // Minimum distance between partials (value)

  //--- Symbol Functions
  void               RefreshSymbolData();

  //--- Partials closures Functions
  virtual void       ClosePartialsForBuyPositions();
  virtual void       ClosePartialsForSellPositions();


public:
                     CConditionalPartials();
                    ~CConditionalPartials();

  //--- Initialization function
  bool               Init(ConditionalPartialConfig& config);

  //--- Add function
  virtual void       AddPositionToTrack(ENUM_POSITION_TYPE position_type, ulong position_ticket, double open_price);
  bool               AddPositionToTrack(ulong position_ticket);

  //--- Remove
  bool               RemoveTrackedPosition(ulong position_ticket);

  //--- Events functions
  void               OnOpenClosePosition(const ROnOpenClosePosition &pos) override final;

  //--- Execute function
  void               Execute(const datetime& current_time); // OnNewBar

  //--- Getter and Setters
  // Condition
  IConditionPartial* PartialCloseCondition() { return m_partial_condition; }
  void               PartialCloseCondition(IConditionPartial* new_condition, bool delete_prev_ptr);

  // Magic number
  ulong              MagicNumber() const { return m_magic_number; }
  void               MagicNumber(ulong new_value);

  // Minimum distance between partial closures
  CDiff*             MinDistBetweenPartialClosures() { return m_min_distance_to_close_pos; }
  void               MinDistBetweenPartialClosures(CDiff* new_value, bool delete_prev_ptr);

  // Symbol
  string             Symbol() { return m_symbol; }
  void               Symbol(string new_symbol);

  // Auto mode
  bool               IsAutoMode() const        { return m_auto_add_to_tracked_positions;      }
  void               AutoMode(bool new_value)  { m_auto_add_to_tracked_positions = new_value; }

  //--- Tracked positions size
  int                TrackedPositionsSize() const { return m_tracked_positions_size; }
 };

//+------------------------------------------------------------------+
//| Constructor                                                      |
//+------------------------------------------------------------------+
CConditionalPartials::CConditionalPartials()
  :
  m_partial_condition(NULL), m_tracked_positions_size(0), m_symbol(NULL), m_symbol_ask(0.00),
  m_symbol_bid(0.00), m_symbol_digits(0), m_symbol_min_volume(0.00), m_symbol_volume_step(0.00), m_auto_add_to_tracked_positions(true),
  m_min_distance_to_close_pos(NULL), m_magic_number(NOT_MAGIC_NUMBER), m_volume_to_close_size(0), m_min_distance_value(0.00), m_delete_partial_condition_in_dstctor(true)
 {
  account_status.RegisterEvent(&this, ACCOUNT_STATUS_REG_FLAG_ON_OPEN_CLOSE_POSITION);
  ::ArrayResize(m_tracked_positions_arr, 0, CONDITIONAL_PARTIAL_ARR_MAIN_RESERVE);
 }

//+------------------------------------------------------------------+
//| Destructor                                                       |
//+------------------------------------------------------------------+
CConditionalPartials::~CConditionalPartials()
 {
//--- Delete of event pool
  if(account_status.IsActive())
    account_status.UnregisterEvent(&this, ACCOUNT_STATUS_REG_FLAG_ON_OPEN_CLOSE_POSITION);

//--- Delete condition
  if(m_delete_partial_condition_in_dstctor && CheckPointer(m_partial_condition) == POINTER_DYNAMIC)
   {
    delete m_partial_condition;
   }

//--- Delete diff
  if(CheckPointer(m_min_distance_to_close_pos) == POINTER_DYNAMIC)
   {
    delete m_min_distance_to_close_pos;
   }
 }

//+------------------------------------------------------------------+
//| Initialization function, the function sets the class parameters  |
//| through the "config" variable.                                   |
//| Inputs:                                                          |
//| - ConditionalPartialConfig& config: variable that will store the |
//|   initial class configuration.                                   |
//| Outputs:                                                         |
//| - bool: The function returns true on success, otherwise false.   |
//+------------------------------------------------------------------+
bool CConditionalPartials::Init(ConditionalPartialConfig& config)
 {
//--- Check parameters are valid
  string err = "";
  if(!config.IsValid(err))
   {
    LogError(err, FUNCION_ACTUAL); // Show error
    return false;
   }

//--- Assignment
  m_magic_number = config.magic_number;
  m_symbol = config.symbol;
  m_min_distance_to_close_pos = config.min_distance_to_close_pos;
  m_auto_add_to_tracked_positions = config.auto_mode;
  m_trade.SetExpertMagicNumber(m_magic_number);

// Partial condition
  m_partial_condition = config.condition;
  m_delete_partial_condition_in_dstctor = config.delete_condition;

//--- Symbol refresh
  RefreshSymbolData();

//--- Convert str to double array
  if(!config.ConvertStrToDoubleArr(',', m_volumes_to_close_arr, err))
   {
    LogError(err, FUNCION_ACTUAL); // Show error
    return false;
   }

//--- Convert to "decimal"
  int idx_to_remove[];
  m_volume_to_close_size = ::ArraySize(m_volumes_to_close_arr);
  for(int i = 0; i < m_volume_to_close_size; i++)
   {
    const double val = m_volumes_to_close_arr[i];
    if(val > 100.0)
     {
      LogWarning(::StringFormat("Found at position %d, value greater than 100.00%%, omitting value", i), FUNCION_ACTUAL);
      idx_to_remove.Push(i);
      continue;
     }
    else
      if(val < 0.000001)
       {
        LogWarning(::StringFormat("Found at position %d, value less than 0.000001%%, omitting value", i), FUNCION_ACTUAL);
        idx_to_remove.Push(i);
        continue;
       }
    m_volumes_to_close_arr[i] /= 100.00;
   }

  m_volume_to_close_size = RemoveMultipleIndexes(m_volumes_to_close_arr, idx_to_remove, 0);

//--- Check array size
  if(m_volume_to_close_size < 1)
   {
    LogError("The size of the array of volumes to be closed is less than 1", FUNCION_ACTUAL);
    return false;
   }

//--- Print array
  if(IsInfoLogEnabled())
   {
    ArrayPrint(m_volumes_to_close_arr, 2, " | ");
   }


//--- Finish
  return true;
 }

//+-------------------------------------------------------------------------------------------+
//| Function that executes the main logic of the class                                        |
//| Inputs:                                                                                   |
//| datetime current_time: Variable of datetime type, which must                              |
//| store the current time.                                                                   |
//| Outputs: the function returns nothing.                                                    |
//| Notes:                                                                                    |
//| - The function can be called on each tick or each bar, this                               |
//|   will depend on the Execute function of the m_partial_condition variable,                |
//|   for example if the condition is an indicator, like RSI                                  |
//|   the logic could be executed on each candle, or for example if the condition             |
//|   evaluates a mitigation of an orderblock, in this case it would be executed on each tick |
//|                                                                                           |
//| - The define "CONDITIONAL_PARTIAL_EXECUTE_WHEN_THE_ARE_POSITIONS",                        |
//|   allows conditional code compilation, if this define is defined                          |
//|   the Execute(..) function of the m_partial_condition pointer, will only be called        |
//|   when there are open positions, otherwise if the define is not defined                   |
//|   it will be called at all times.                                                         |
//+-------------------------------------------------------------------------------------------+
//#define CONDITIONAL_PARTIAL_EXECUTE_WHEN_THE_ARE_POSITIONS

//+------------------------------------------------------------------+
void CConditionalPartials::Execute(const datetime&  current_time)
 {
#ifdef CONDITIONAL_PARTIAL_EXECUTE_WHEN_THE_ARE_POSITIONS
  if(m_tracked_positions_size > 0)
   {
    //--- Execution
    m_partial_condition.Execute(current_time);

    //--- Close conditions
    const bool buy  = m_partial_condition.CloseBuy();
    const bool sell = m_partial_condition.CloseSell();

    //--- Obtain min diff
    if(buy || sell)
     {
      m_min_distance_to_close_pos.OnNewBar();
      m_min_distance_value =  m_min_distance_to_close_pos.Diff();

      //--- Check buy condition
      if(buy)
       {
        m_symbol_bid = ::SymbolInfoDouble(m_symbol, SYMBOL_BID);
        ClosePartialsForBuyPositions();
       }

      //--- Check sell condition
      if(sell)
       {
        m_symbol_ask = ::SymbolInfoDouble(m_symbol, SYMBOL_ASK);
        ClosePartialsForSellPositions();
       }
     }
   }
#else
//--- Execution
  m_partial_condition.Execute(current_time);

//--- Check conditions
  if(m_tracked_positions_size > 0)
   {
    //--- Close conditions
    const bool buy  = m_partial_condition.CloseBuy();
    const bool sell = m_partial_condition.CloseSell();

    //--- Obtain min diff
    if(buy || sell)
     {
      m_min_distance_to_close_pos.OnNewBar();
      m_min_distance_value =  m_min_distance_to_close_pos.Diff();

      //--- Check buy condition
      if(buy)
       {
        m_symbol_bid = ::SymbolInfoDouble(m_symbol, SYMBOL_BID);
        ClosePartialsForBuyPositions();
       }

      //--- Check sell condition
      if(sell)
       {
        m_symbol_ask = ::SymbolInfoDouble(m_symbol, SYMBOL_ASK);
        ClosePartialsForSellPositions();
       }
     }
   }
#endif
 }

//+------------------------------------------------------------------+
//| Function that executes every time a trade is closed or opened    |
//+------------------------------------------------------------------+
void CConditionalPartials::OnOpenClosePosition(const ROnOpenClosePosition &pos)
 {
//---
  if(pos.deal_entry_type == DEAL_ENTRY_OUT)
   {
    // Once the position is closed we verify if that ticket is in the internal array, if so the function
    // will remove it.
    if(RemoveIndexFromAnArrayOfPositions(m_tracked_positions_arr, pos.position.ticket, CONDITIONAL_PARTIAL_ARR_MAIN_RESERVE))
      m_tracked_positions_size--; // Change the value of the array size
   }
  else
    if(m_auto_add_to_tracked_positions && pos.deal_entry_type  == DEAL_ENTRY_IN
       && account_status.LastTransctionSymbol() == m_symbol && (pos.position.magic == m_magic_number || m_magic_number == NOT_MAGIC_NUMBER))
     {
      LogInfo(::StringFormat("A trade has just been opened with ticket %I64u", pos.position.ticket), FUNCION_ACTUAL);
      AddPositionToTrack(pos.position.type, pos.position.ticket, pos.position.open_price);
     }
 }

//+-------------------------------------------------------------------------+
//| The function creates a new trackable position and adds it               |
//| to the internal array.                                                  |
//| Inputs:                                                                 |
//| - ENUM_POSITION_TYPE position_type: position type (buy or sell)         |
//| - ulong position_ticket: Position ticket.                               |
//| - double open_price: Trade opening price.                               |
//| Outputs: The function returns no value.                                 |
//| Notes:                                                                  |
//| - The position ticket must be valid,                                    |
//|   the function will not check if the ticket exists.                     |
//+-------------------------------------------------------------------------+
void CConditionalPartials::AddPositionToTrack(ENUM_POSITION_TYPE position_type, ulong position_ticket, double open_price)
 {
//---
  if(m_tracked_positions_size == 0) // First position to be added to the tracked positions array
    m_partial_condition.OnInitPartials(open_price);

//--- Obtain current value
  m_min_distance_to_close_pos.OnNewBar();
  m_min_distance_value =  m_min_distance_to_close_pos.Diff();

//--- Creation of a new position to track
  ConditionalPartialTrackedPosition new_tracked;
  new_tracked.type = position_type;
  new_tracked.ticket = position_ticket;
  new_tracked.next_min_price =  position_type == POSITION_TYPE_BUY ? open_price + m_min_distance_value : open_price - m_min_distance_value;
  new_tracked.next_index_to_close = 0;

//--- Add to tracked positions
  ::ArrayResize(m_tracked_positions_arr, m_tracked_positions_size + 1, CONDITIONAL_PARTIAL_ARR_MAIN_RESERVE);
  m_tracked_positions_arr[m_tracked_positions_size] = new_tracked;
  m_tracked_positions_size++;
 }

//+-------------------------------------------------------------------------+
//| With a function similar to the AddPositionToTrack(...) function         |
//| differing in that this overloaded function only requires the            |
//| position ticket (the function internally already queries the            |
//| position type, open_price, etc.).                                       |
//| Inputs:                                                                 |
//| - ulong position_ticket: Position ticket.                               |
//| Outputs: Returns true if a trackable position could be created with the |
//|          ticket, otherwise false                                        |
//| Notes:                                                                  |
//| - If the position ticket doesn't exist, or is invalid (failure of       |
//|   PositionSelectByTicket) the function will not create a new trackable  |
//|   position with the ticket                                              |
//+-------------------------------------------------------------------------+
bool CConditionalPartials::AddPositionToTrack(ulong position_ticket)
 {
//--- Select
  if(!::PositionSelectByTicket(position_ticket))
   {
    LogError(::StringFormat("Invalid ticket: %I64u", position_ticket), FUNCION_ACTUAL);
    return false;
   }

//--- Check symbol
  const string sym =::PositionGetString(POSITION_SYMBOL);
  if(sym != m_symbol)
   {
    LogError(::StringFormat("The symbol for position %I64u = %s, does not correspond to that of the class = %s", position_ticket, sym, m_symbol), FUNCION_ACTUAL);
    return false;
   }

//--- Add
  AddPositionToTrack((ENUM_POSITION_TYPE)::PositionGetInteger(POSITION_TYPE), position_ticket, ::PositionGetDouble(POSITION_PRICE_OPEN));
  return true;
 }

//+------------------------------------------------------------------+
//| Function that iterates over all positions to track (buy)         |
//| and partially closes the trade                                   |
//+------------------------------------------------------------------+
void CConditionalPartials::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_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[m_tracked_positions_arr[i].next_index_to_close] * lot_size;

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

      //---
      m_tracked_positions_arr[i].next_index_to_close++; // Skip this "partial close", advance to next index
      if(m_tracked_positions_arr[i].next_index_to_close == m_volume_to_close_size) // Limit reached
       {
        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_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);

    //--- Next index
    m_tracked_positions_arr[i].next_index_to_close++;

    //--- Check limit
    if(m_tracked_positions_arr[i].next_index_to_close == m_volume_to_close_size) // Limit reached
     {
      AddArrayNoVerification2(m_indexes_to_remove, i, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE)
     }
   }

//--- 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 CConditionalPartials::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_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[m_tracked_positions_arr[i].next_index_to_close] * lot_size;

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

      //--- Increment
      m_tracked_positions_arr[i].next_index_to_close++; // Skip this "partial close", advance to next index

      //--- Check limits
      if(m_tracked_positions_arr[i].next_index_to_close == m_volume_to_close_size) // Limit reached
       {
        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_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);

    //--- Next index
    m_tracked_positions_arr[i].next_index_to_close++;

    //--- Check limit
    if(m_tracked_positions_arr[i].next_index_to_close == m_volume_to_close_size) // Limit reached
     {
      AddArrayNoVerification2(m_indexes_to_remove, i, CONDITIONAL_PARTIAL_ARR_TO_REMOVE_RESERVE)
     }
   }

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

//+----------------------------------------------------------------------------------+
//| The function sets a new partial close "condition", it changes                    |
//| the "address" of the m_partial_condition pointer to new_condition, and           |
//| if necessary the previous pointer is deleted                                     |
//| Inputs:                                                                          |
//| - IConditionPartial *new_condition: Pointer to IConditionPartial.                |
//| - bool delete_prev_ptr: Boolean indicating if the internal pointer is deleted    |
//| Outputs: The function returns nothing.                                           |
//+----------------------------------------------------------------------------------+
void CConditionalPartials::PartialCloseCondition(IConditionPartial *new_condition, bool delete_prev_ptr)
 {
//--- Delete prev ptr
  if(delete_prev_ptr && ::CheckPointer(m_partial_condition) == POINTER_DYNAMIC)
   {
    delete m_partial_condition;
   }
//---
  m_partial_condition = new_condition;
 }

//+------------------------------------------------------------------+
//| Sets a new internal pointer for the minimum distance             |
//| between partials.                                                |
//| Inputs:                                                          |
//| - CDiff *new_value: Pointer to CDiff.                            |
//| - bool delete_prev_ptr: Boolean indicating if the                |
//|   internal class pointer m_min_distance_to_close_pos is deleted  |
//|   before assigning it a new "value" (address).                   |
//| Outputs: The function returns no value                           |
//+------------------------------------------------------------------+
void CConditionalPartials::MinDistBetweenPartialClosures(CDiff *new_value, bool delete_prev_ptr)
 {
//--- Delete prev ptr
  if(delete_prev_ptr && ::CheckPointer(m_min_distance_to_close_pos) == POINTER_DYNAMIC)
   {
    delete m_min_distance_to_close_pos;
   }
//---
  m_min_distance_to_close_pos = new_value;
 }

//+------------------------------------------------------------------+
//| Sets a new value for the magic number                            |
//| Inputs:                                                          |
//| - ulong new_value: new magic number value.                       |
//| Outputs: The function returns no value                           |
//+------------------------------------------------------------------+
void CConditionalPartials::MagicNumber(ulong new_value)
 {
  m_magic_number = new_value;
  m_trade.SetExpertMagicNumber(new_value);
 }

//+------------------------------------------------------------------+
//| Sets a new symbol.                                               |
//| Inputs:                                                          |
//| - string new_symbol: New symbol.                                 |
//| Outputs: The function returns no value.                          |
//| Notes:                                                           |
//| - The function should only be called when there are no           |
//|   open positions, to avoid unexpected bugs with                  |
//|   tracked positions from other symbols.                          |
//+------------------------------------------------------------------+
void CConditionalPartials::Symbol(string new_symbol)
 {
  m_symbol = new_symbol;
  RefreshSymbolData();
 }

//+------------------------------------------------------------------+
//| Removes a trackable position from the internal array             |
//| Inputs:                                                          |
//| ulong position_ticket: Ticket of the trackable position to be    |
//| removed                                                          |
//| Outputs: The function returns true, if the ticket was            |
//| successfully removed, otherwise false (ticket does not           |
//| exist).                                                          |
//+------------------------------------------------------------------+
bool CConditionalPartials::RemoveTrackedPosition(ulong position_ticket)
 {
  if(RemoveIndexFromAnArrayOfPositions(m_tracked_positions_arr, position_ticket, CONDITIONAL_PARTIAL_ARR_MAIN_RESERVE))
   {
    m_tracked_positions_size--; // Resize
    return true; // Success
   }
  return false; // Error, or position_ticket not exist in array
 }

//+------------------------------------------------------------------+
//| "Re-queries" the values of minimum volume, volume step and       |
//| symbol digits.                                                   |
//+------------------------------------------------------------------+
void CConditionalPartials::RefreshSymbolData(void)
 {
  m_symbol_digits = (int8_t)::SymbolInfoInteger(m_symbol, SYMBOL_DIGITS);
  m_symbol_min_volume = ::SymbolInfoDouble(m_symbol, SYMBOL_VOLUME_MIN);
  m_symbol_volume_step = ::SymbolInfoDouble(m_symbol, SYMBOL_VOLUME_STEP);
 }
#endif // MQLARTICLES_POSMGMT_CONDPARTIALS_BASE_BASE_MQH
//+------------------------------------------------------------------+