Contents

kc_lower

Keltner Channels Lower Band

`kc_lower(source, length, mult, matype="ema", atr_length=..., atr_matype="wilder", bandstyle="atr")`

Parameters

Name	Type	Description
`source`	field	Price field for the middle line (typically close)
`length`	int	Period for the middle line MA
`mult`	float	Multiplier for band width

Formula

KC Lower = MA(source, length) - mult * range_value

Examples

kc_low = kc_lower(close, 20, 2.0);  # Standard KC lower
kc_low = kc_lower(close, 20, 2.0, matype="sma");  # SMA-based middle
kc_low = kc_lower(close, 20, 2.0, atr_length=14);  # Different ATR period
kc_low = kc_lower(close, 20, 2.0, bandstyle="range");  # Raw high - low band, no smoothing
close < kc_low;  # Price below lower band (oversold)

Returns

float

Range

length is bound by matype's MA family (2-210 ema default, 2-105 wilder, 2-400 windowed sma/wma), capped at the 2-105 wilderma ATR ceiling unless atr_length overrides it; atr_length independently must be 2-105

Notes

TradingView default pairs EMA middle with ATR bands; atr_length lets the band smoothing diverge from the middle line; bandstyle="range" reproduces the original 1960s Keltner formulation

References

TradingView: part of ta.kc(); original Keltner used SMA/range, modern (Linda Bradford Raschke) uses EMA/ATR

Back to Reference Try it in Scanner