aroon_up

Aroon Up - measures time since highest high

`aroon_up(period)`

Parameters

Name	Type	Description
`period`	int	Number of periods to look back for highest high

Formula

aroon_up = ((period - bars_since_highest_high) / period) * 100

Examples

aroon_up(25);  # Standard 25-period Aroon Up
aroon_up(14);  # Shorter period (more sensitive)
aroon_up(25) > 70;  # Strong uptrend (recent highs)

Returns

float

Range

period must be 2-400

Notes

The correlated subquery always finds the window's own max within itself, so bars_since_highest_high resolves to a value in [0, period-1] on every bar -- never NULL

References

TradingView: ta.aroon() returns [up, down]; developed by Tushar Chande

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