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# Average True Range

<mark style="color:red;">`atr(`</mark>[<mark style="color:blue;">`candles`</mark>](/function/functions/candles.md)<mark style="color:red;">`: List[[`</mark>[<mark style="color:blue;">`Candle`</mark>](/function/structures.md#candle)<mark style="color:red;">`]], period: int = 14) -> List[Decimal]`</mark>

## Average True Range (ATR)