Pine Script v6 Custom Functions: Build Reusable Mathematical Utilities for Cleaner Code
As Pine Script indicators and strategies grow in complexity, repeating the same mathematical calculations across multiple lines creates maintenance overhead and increases the risk of inconsistency. Custom functions in Pine Script v6 allow you to encapsulate reusable logic into named, callable units — producing cleaner, more testable, and more maintainable code. 1. The Anatomy of a Pine Script Custom Function A Pine Script custom function is defined using a specific syntax block. The function body is indented, and the last evaluated expression in the function body is automatically returned — there is no return keyword. //@version=6 indicator("Custom Function Demo", overlay = false) // --- Function Definition --- // A function that computes the True Range manually // Parameters: high_, low_, prevClose_ (all float) // Returns: float — the True Range value trueRange(high_, low_, prevClose_) => // Candidate 1: Current Hig...
