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Keywords

These spellings are reserved in keyword positions (they cannot be used as ordinary identifiers where the grammar expects a keyword). Identifiers elsewhere follow the lexical rules in spec/agentscripts-v1.md.

This page lists language keywords and notes partial vs TradingView behavior where it matters.

Sources for the exact grammar: spec/agentscripts-v1.md and spec/qas-v1-parser-status.md.

Script and modules

indicator, strategy, library

Introduce a script declaration with a parenthesized argument list. See program-structure.md.

Note: Script kind affects which builtin namespaces are valid (e.g. strategy.* in strategies). See ROADMAP.md.

import

import path as alias — Pine-style library path.

export

Valid in library() scripts; see program-structure.md.

Types and user-defined types

enum

enum Name { variant = expr ; … } — braced body required in this dialect.

type

type Name { fields } — user-defined type with field defaults.

Functions

f

QAS user-function introducer: f name ( params ) => … or { … }.

method

method name ( params ) … — method-style declaration. Parser and checker support may still lag TradingView in some cases (ROADMAP.md).

Variable declarations

Qualifiers (see types.md for qualifier positions):

Keyword Role
var Persistent variable
varip Intrabar persistent
const Constant
input Input (also standalone input declaration form)
simple Simple type qualifier (Pine)
series Series qualifier (Pine)

Forms combine qualifier? type? name assign_op expr; see EBNF in spec/agentscripts-v1.md §3.

Control flow

Keyword Meaning
if Statement: if cond { … } with optional else / else if. Expression: see operators.md (if–else expression).
else Part of if statement or if expression
for Numeric for i = from to to [by step] { … } or for x in expr { … } or for [ i , v ] in expr { … }
to, by Parts of numeric for (to required; by optional)
in for … in only
while while cond { … }
switch switch scrutinee? { arms } — arms use => (see below)
break Exits innermost for / while (must appear inside a loop)
continue Next iteration of innermost for / while

Logical operators (expression keywords)

Keyword Role
not Logical not (unary)
and Logical and (short-circuiting)
or Logical or (short-circuiting)

Literals

Keyword Meaning
true, false Boolean literals
na “Not available” / null-like sentinel

switch arms

Switch bodies use fat arrow => between condition and statement: either expr => stmt, or a default => stmt. The scrutinee may be omitted for strategy-style switching.

Examples (minimal)

//@version=6
indicator("Kw", overlay = true)

f add(float a, float b) =>
    a + b

for i = 0 to 10 by 2 {
    continue
}

switch close {
    1.0 => 1
    => na
}

Builtins vs keywords

Names like ta, close, or strategy may appear as identifier paths when not in a keyword position. Builtin libraries are not exhaustively documented in this directory; see LLM_MANIFEST.md section 4 and ROADMAP.md.