Overview
This prompt aims to guide developers in enhancing an Expert Advisor for MT5 by adding partial position closing functionality. Programmers working on trading algorithms will benefit by learning how to implement new features without disrupting existing code.
Prompt Overview
Purpose: This enhancement allows for partial closing of positions in the EA without altering existing functionality.
Audience: This is intended for developers familiar with MQL5 and MetaTrader 5.
Distinctive Feature: New input parameters will enable users to specify the volume or percentage for partial position closing.
Outcome: The EA will maintain its original behavior while providing additional flexibility for position management.
“`mql5
input double PartialCloseVolume = 0.0; // Volume to partially close the position
input double PartialClosePercentage = 0.0; // Percentage of the position to close partially
“`
Quick Specs
- Media: Text
- Use case: Generation
- Industry: Cryptocurrency & Blockchain, Development Tools & DevOps, Productivity & Workflow
- Techniques: Role/Persona Prompting
- Models: Claude 3.5 Sonnet, Gemini 2.0 Flash, GPT-4o, Llama 3.1 70B
- Estimated time: 5-10 minutes
- Skill level: Beginner
Variables to Fill
No inputs required — just copy and use the prompt.
Example Variables Block
No example values needed for this prompt.
The Prompt
You are given an Expert Advisor (EA) code for MetaTrader 5 (MT5) that currently lacks the ability to close positions partially. Your task is to enhance the EA by adding inputs that enable partial position closing functionality without altering any existing code logic or structure.
**Specifically, you must:**
– Add new input parameters to the EA that allow specifying the portion or volume of the position to close partially.
– Ensure that no existing code or business logic is modified; only add inputs to facilitate partial closing.
– Maintain the original behavior and integrity of the EA aside from incorporating these inputs.
**# Steps**
1. Review the current EA inputs and identify how to add parameters related to partial position closing without changing code logic.
2. Define new input parameters indicating the partial close volume or percentage.
3. Ensure these inputs are integrated properly within the EA’s input declarations.
4. Avoid any alteration of existing functions, calculations, or code flow.
**# Output Format**
Provide the exact input declarations to be added to the EA code in MQL5, with appropriate data types and default values, formatted as they would appear in the EA source code.
**# Notes**
– Do not implement any closing logic or modify existing functions.
– Only the input definitions and minimal comment additions related to partial close should be included.
Screenshot Examples
How to Use This Prompt
- Copy the prompt provided above.
- Open your MetaTrader 5 EA code in an editor.
- Locate the input parameters section of the EA.
- Paste the copied prompt for reference while editing.
- Add new input parameters for partial position closing as specified.
- Save the EA code and test the new inputs.
Tips for Best Results
- Add Input for Partial Close Volume: Include an input parameter for specifying the volume to close partially, e.g., `input double PartialCloseVolume = 0.0;`
- Add Input for Partial Close Percentage: Introduce an input parameter for defining the percentage of the position to close, e.g., `input double PartialClosePercentage = 0.0;`
- Document New Inputs: Add comments above the new input parameters to explain their purpose, ensuring clarity for future users.
- Maintain Existing Logic: Ensure that these new inputs are added without modifying any existing code or logic within the EA.
FAQ
- What are input parameters for partial position closing?
Input parameters specify the volume or percentage of the position to close partially. - How do you add new input parameters in MQL5?
Use the 'input' keyword followed by the data type and variable declaration. - What is the default value for partial close volume?
The default value can be set to 0.0 for volume or 0% for percentage. - Can existing EA logic be altered when adding inputs?
No, the existing code logic and structure must remain unchanged.
Compliance and Best Practices
- Best Practice: Review AI output for accuracy and relevance before use.
- Privacy: Avoid sharing personal, financial, or confidential data in prompts.
- Platform Policy: Your use of AI tools must comply with their terms and your local laws.
Revision History
- Version 1.0 (February 2026): Initial release.
