all_time_high

Returns the highest value ever reached for a given field from the first trading day to the current bar.

Parameters

• source (field, required): Field to track maximum value - typically high, close, or other price field

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

The maximum value of the specified field from inception to current bar.

Notes

• Requires full price history for accurate calculation (infinite lookback)
• Useful for identifying stocks near all-time highs
• Commonly used with percentage thresholds (e.g., close > ATH * 0.95)
• Works in MTF mtf() blocks for cross-timeframe analysis
• Value increases monotonically (never decreases over time)