programming patterns - decorator
Info
The programming patterns - decorator is a Script for MetaTrader 5 that • inheritance is not always flexible. • composition and delegation is sometimes a good alternative to dynamically add new behavior.
Usage
This tool is typically used for enhancing chart analysis and decision making.
Platform
This Script works exclusively on MetaTrader 5 (both build 600+ and newer versions).
Setup
Place the downloaded file in MQL5/Scripts folder via File ? Open Data Folder in MetaTrader 5.
How to Install and Use programming patterns - decorator
1. Installation: Move your script file into the MQL/Scripts directory and restart the platform.
2. Execution: Drag the script onto a chart; it will perform a one-time action, such as closing all open orders or clearing chart objects.
3. Editing: Use MetaEditor (F4) to modify code, click "Compile," and verify no errors appear in the terminal before running.
4. Removing: Scripts stop automatically, but you can remove them manually by right-clicking the chart and choosing "Remove Script."
Frequently Asked Questions
Q: How are scripts different from EAs? A: Scripts execute a single action and then stop; EAs monitor the market and trade continuously.
Q: Can I assign a hotkey to a script? A: Yes, right-click the script in the Navigator, select "Set Hotkey," and define your preferred keyboard shortcut.
Q: Why did my script stop? A: Scripts are designed to stop immediately after finishing their programmed command; this is normal behavior.
What this tool does
• inheritance is not always flexible.
Typical Use Case
This Script excels in automated trading and technical analysis on MetaTrader 5.
Compatible Platform & Setup
This Script works on MetaTrader 5. Place the file in the MQL5/Scripts folder and restart the terminal.
Description & Settings
Related: programming patterns - strategy - another powerful script for MetaTrader 5 traders.
• inheritance is not always flexible. • composition and delegation is sometimes a good alternative to dynamically add new behavior. • decorator type matches component type. • decorators change component behavior without changing the component code. • a component may have arbitrary number of decorators.Also recommended: programming patterns - observer - similar script with strong performance on MetaTrader 5.
• decorators are transparent to the client, unless the client depends on a particular component.rule: open classes for extension and close for changes.
You may also like: programming patterns - abstract factory - excellent alternative for script users on MetaTrader 5.
Source Code
class a_component
{
public:
a_component() : m_name("unknown") {}
virtual string name() { return m_name; }
virtual double mass()=0;
protected:
string m_name;
};
class a_decorator : public a_component.......
⚠ Limitations & Risk Warning
- This tool is provided for educational and testing purposes only.
- Past performance does not guarantee future results.
- Trading involves substantial risk of loss. Use on a demo account first.
- Results may vary depending on market conditions, broker, and settings.
- We recommend thorough backtesting and forward testing before using with real funds.