kc_upper

Keltner Channels Upper Band

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

Parameters

Name	Type	Description
`source`	field	Price field for middle line calculation (typically close)
`length`	int	Period for middle line MA calculation
`mult`	float	Multiplier for band width
`matype`	str, optional	MA type for middle line
`atr_length`	int, optional	Period for volatility calculation (ATR/range)
`atr_matype`	str, optional	MA type for ATR smoothing
`bandstyle`	str, optional	Volatility measurement method

Formula

```
middle = MA(source, length, matype)

if bandstyle == "atr":
    range_value = ATR(atr_length or length, matype=atr_matype)
elif bandstyle == "truerange":
    range_value = TrueRange (no averaging)
elif bandstyle == "range":
    range_value = WilderMA(high - low, atr_length or length)

upper = middle + (mult * range_value)
```

Examples

kc_up = kc_upper(close, 20, 2.0);  # Standard KC upper
kc_up = kc_upper(close, 20, 2.0, matype="sma");  # SMA-based middle
kc_up = kc_upper(close, 20, 2.0, atr_length=14);  # Different ATR period
kc_up = kc_upper(close, 20, 2.0, atr_matype="ema");  # EMA-smoothed ATR
kc_up = kc_upper(close, 20, 2.0, bandstyle="range");  # Wilder MA of range
close > kc_up;  # Price above upper band (breakout)

Returns

Float value representing the upper band ## References - TradingView: Part of `ta.kc()` return values - Original Keltner used SMA and simple range - Modern version (Linda Bradford Raschke) uses EMA and ATR ## Notes - TradingView default: EMA middle with ATR bands - atr_length allows different smoothing for bands vs middle - bandstyle="range" mimics original Keltner formulation

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