> For the complete documentation index, see [llms.txt](https://docs.origami.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.origami.tech/reference/grid-language/indicators/true-range.md).

# True Range

tr() calculates the True Range of each candle, the base value for ATR and other volatility measures.

The True Range indicator in Origami Tech measures intraday volatility, helping traders set dynamic stop levels and assess price movement.

## True Range

`tr(candles: List[[Candle]]) -> List[Decimal]`