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

See Also

kc_upper, kc_middle, kcw

References

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

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