Discussing the article: "Modular Indicator Architecture in MQL5 (Part 1): Stop Copy-Pasting and Start Writing Scalable, Reusable Code"

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Check out the new article: Modular Indicator Architecture in MQL5 (Part 1): Stop Copy-Pasting and Start Writing Scalable, Reusable Code.

This article develops an object-oriented framework for MQL5 indicators by evolving a primitive example into reusable modules. It formalizes partial buffer recalculation in OnCalculate, moves logic into header-based classes (CAppliedPrice, CSma), and introduces CSubIndiBase, CIndicatorBase, and a registry to centralize requirements. You get portable components, isolated inputs, and clean buffers with minimal boilerplate, making new indicators faster to assemble and easier to maintain.

Some time ago, I decided to write an article about developing a custom indicator. I then realized it would be misleading to use my framework without introducing it first. That is why you are reading this introductory article. The material turned out to be extensive, so it will be split into two parts.

In this first article, we will develop a framework for portable, reusable, and maintainable indicators. I could have presented the final solution and explained it afterwards, but that would not provide a solid understanding of the mechanics. Instead, we will start with a primitive implementation of a very simple indicator and gradually refactor it, evolving the codebase step by step into a full-featured template. By building it from the ground up, you'll see exactly what problems we are solving at each stage and why this specific architecture is necessary.

Author: Vladislav Boyko