How can I create a Stochastic Oscillator in Pine Script?

Yes sir, you can definitely create a Stochastic Oscillator in Pine Script.

The Stochastic Oscillator mainly uses the current close compared with the highest high and lowest low over a selected period.

-> %K measures the current price position within that high-low range.

-> %D is a moving average of the %K line.

You can create a basic version using:

//@version=6
indicator("Custom Stochastic", overlay=false)

kLength = input.int(14, "%K Length")
kSmooth = input.int(3, "%K Smoothing")
dLength = input.int(3, "%D Length")

rawK = ta.stoch(close, high, low, kLength)
k = ta.sma(rawK, kSmooth)
d = ta.sma(k, dLength)

kPlot = plot(k, "%K")
dPlot = plot(d, "%D", color = color.orange)

overbought = hline(80, "Overbought")
MiddLine = hline(50, "Midline")
oversold = hline(20, "Oversold")

fill(overbought, oversold, color=color.new(color.blue, 90))

-> The %K line represents the current price position within the selected high-low range.

-> The %D line is a smoothed version of %K.

-> 80 is commonly used as the overbought level.

-> 20 is commonly used as the oversold level.

-> The input values allow to adjust the calculation from the indicator settings.

=> This gives you a configurable Stochastic Oscillator without depending on the built-in chart indicator.

So that’s how you can create a basic Stochastic Oscillator in Pine Script.