Programming Patterns Decorator script for MetaTrader 5

 • 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.

 • Decorators are transparent to the client, unless the client depends on a particular component.

RULE: Open classes for extension and close for changes.

Programming Patterns Decorator script for MetaTrader 5

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Programming Patterns Decorator script for MetaTrader 5

MT5 Forex Script Characteristics

Platform: Metatrader 5

Type: Script

Time frames: any.

How to install Screenshot Script in MetaTrader 5 / MT5:

Copy and paste the c_decorator.mql5 files into the MQL5 Scripts folder of the Metatrader 4 trading platform.

Restart your MetaTrader 5 application (assuming it’s currently open) … or Launch your MetaTrader 4 application

You can access this folder from the top menu as follows:

File > Open Data Folder > MQL5 > Script (paste here)

On the left hand side, look for the “Navigator” window and under the “Common” tab, look into the “Scripts” section

Locate the indicator which you have just downloaded into the folder stated in Step 1

Drag (Click and drag) the Script onto the chart (when you want the task to be performed)

your task should now be executed…

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