all_time_high

All-Time High (Maximum value from inception)

`all_time_high(source)`

Parameters

Name	Type	Description
`source`	field	Field to track maximum value, typically high or close

Formula

all_time_high(field) = MAX(field) from first trading day to current bar

Examples

all_time_high(high);  # Highest price ever reached
all_time_high(close);  # Highest closing price ever
close > all_time_high(high) * 0.95;  # Within 5% of all-time high
weekly_ath = mtf("1W") { all_time_high(high); };  # Weekly ATH for cross-timeframe analysis

Returns

float

Notes

Requires full price history (infinite lookback); useful for identifying stocks near all-time highs, commonly with percentage thresholds like close > all_time_high(high) * 0.95; works in mtf() blocks for cross-timeframe analysis; the value increases monotonically, never decreasing over time