nModify Orders - library for MetaTrader 5

Modify_Orders.mqh is intended for managing positions and orders in MetaTrader 5

Purpose

Modify_Orders.mqh provides two powerful functions for managing open positions and pending orders in Expert Advisors and indicators on the MetaTrader 5 platform. It is designed to automate routine operations for modifying Stop Loss, Take Profit levels and order prices.

Main features:

• Modification of Stop Loss and Take Profit for open positions

• Modification of pending orderprices

• Flexible filtering by position types, profitability and symbols

• Support for different modes ofvalue calculation (in pips or absolute prices).

Structure

Modify_Position() function

Designed to modify Stop Loss and Take Profit levels of open positions.

void Modify_Position(
   string tp_and_sl,      // "SL" or "TP" - what we change.
   string price_and_value, // "Value" or "Price" - type of value
   string type_position,   // Filter by position type
   double price_tp_and_sl, // Value to set
   string symb,           // Trading instrument symbol
   long   magicNumber     // Magic Number Expert.
);

Parameters of position filtering:

Examples of use:

// Set SL to 1000 points for all positions
Modify_Position("SL", "Value", "All", 1000, _Symbol, 0);

// Set TP to 1.2345 for profitable Buy positions
Modify_Position("TP", "Price", "Buy Profit", 1.2345, _Symbol, 12345);

// Set SL to 500 points for unprofitable Sell positions
Modify_Position("SL", "Value", "Sell Loss", 500, "EURUSD", 98765);

Modify_Order() function

Designed to modify pending orders (Stop and Limit orders).

void Modify_Order(
   string tp_sl_price,     // "Price", "SL" or "TP".
   string type_order,      // Order type for filtering
   double price_tp_sl_price, // A New Meaning.
   string symb,            // Trading instrument symbol
   long   magicNumber      // Magic Number Expert.
);

Supported order types:

• "Buy Stop" - pending Buy Stop order

• " Buy Limit" - pending Buy Limit order.

• "Sell Stop" - pending Sell Stop order.

• "Sell Limit" - pending Sell Limit order.

Examples of use:

// Change the price of Buy Stop order
Modify_Order("Price", "Buy Stop", 1.2345, _Symbol, 0);

// Set Stop Loss for Sell Limit order
Modify_Order("SL", "Sell Limit", 1.2350, "GBPUSD", 12345);

// Change Take Profit for Buy Limit order
Modify_Order("TP", "Buy Limit", 1.2300, "EURUSD", 98765);

Working principle

Modify_Position algorithm:

1. Searching all open positions in reverse order

2. Filtering of positions by symbol and Magic Number

3. Checking additional conditions ( position type, profitability)

4. Calculation of new SL/TP values:

   • For "Value" mode : Price ± (Value × Point)

   • For "Price" mode : direct value assignment

5. Sending the modification command via OrderSend()

Modify_Order algorithm:

1. Enumerates all pending orders

2. Filtering by symbol, Magic Number and order type

3. Modification of the specified parameter ( price, SL or TP)

4. Saving unchanged parameters

5. Sending modification command

Implementation features

Safety and reliability:

1. Double check of order types - by string parameter and real type from the system

2. Complex filtering - ensures that only target positions/orders are affected

3. Preservation of unchanged parameters - when SL is changed, TP is preserved and vice versa

Mathematical calculations:

ForBuy positions:

• Stop Loss: Current Price - (Value × Point)

• Take Profit: Current price + (Value × Point)

ForSell positions:

• Stop Loss: Current Price + (Value × Point)

• Take Profit: Current Price - (Value × Point)

Recommendations for use

For trading experts:

#include <Modify_Order.mqh>

// In OnTick() function or by condition:
if(Условие_для_трейлинга)
{
    // Pull SL to the price when moving in the desired direction
    Modify_Position("SL", "Value", "All Profit", 500, _Symbol, ExpertMagic);
}

For manual scripts:

// Script for quick SL on all positions
void OnStart()
{
    Modify_Position("SL", "Value", "All", 1000, _Symbol, 0);
}

Optimal parameters:

• Timeframe: any (functions are independent of timeframe)

• Instruments: any currency pairs, metals, indices.

• Magic Number: it is recommended to use unique values for each Expert Advisor.

Library advantages

1. Versatility - works with any trading instruments

2. Flexibility - 18 different modes of position filtering

3. Easy to use - intuitive interface

4. Reliability - comprehensive checks before modification

5. Efficiency - minimal expenditure of computing resources