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= - Pine Script Operator

Overview

The = operator declares a variable and assigns its initial value. Use := to reassign a variable that has already been declared.

Syntax

variableName = initialValue

The compiler infers the variable’s type from the expression unless you declare a type explicitly.

Example

//@version=6
indicator("Assignment example")

int length = 20
float average = ta.sma(close, length)
color plotColor = close >= average ? color.green : color.red

plot(average, "Average", color = plotColor)

Remarks

= initializes a new variable; it does not update an existing variable.
Use var or varip when the initialization should persist across executions, then use := for later reassignment.
A tuple declaration also uses =, for example [macd, signal, histogram] = ta.macd(close, 12, 26, 9).

See also