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pct_change

Percent Change between two values

`pct_change(current, base)`

Parameters

Name	Type	Description
`current`	field	Current/new value (numerator difference component)
`base`	field	Base/reference value (denominator)

Formula

pct_change = ((current - base) / base) * 100

Examples

// Daily change: close vs previous close
pct_change(close, close[1]) > 5;  // Up more than 5% from yesterday

// Gap percentage: open vs previous close
pct_change(open, close[1]) > 2;  // Gapped up more than 2%

// Intraday range: high vs low
pct_change(high, low) > 3;  // Bar range exceeds 3%

// Weekly momentum
pct_change(close, close[5]) > 10;  // Up more than 10% over 5 bars

// Compare to moving average
pct_change(close, sma(close, 20)) > 5;  // 5%+ above 20-day SMA

// Volume surge vs average
pct_change(volume, sma(volume, 20)) > 100;  // Volume 2x+ average

// Find big losers
pct_change(close, close[1]) < -5;  // Down more than 5% today

// Compare high to previous high
pct_change(high, high[1]) > 0;  // Higher high (any amount)

Returns

float

Notes

Returns NULL when base = 0 (division guarded via NULLIF); stocks with a NULL result are excluded from scan results. Unlike roc(), accepts two independent values instead of an implicit lag.

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