Identifiers

Identifiers are names used for user-defined variables and functions:

• They must begin with an uppercase (A-Z) or lowercase (a-z) letter, or an underscore (_).
• The next characters can be letters, underscores or digits (0-9).
• They are case-sensitive.

Here are some examples:

myVar
_myVar
my123Var
functionName
MAX_LEN
max_len
maxLen
3barsDown  // NOT VALID!

The Pine Script™ Style Guide recommends using uppercase SNAKE_CASE for constants, and camelCase for other identifiers:

GREEN_COLOR = #4CAF50
MAX_LOOKBACK = 100
int fastLength = 7
// Returns 1 if the argument is `true`, 0 if it is `false` or `na`.
zeroOne(boolValue) => boolValue ? 1 : 0