Stochastic Oscillator with Signals

//version=5
indicator("Stochastic Oscillator with Signals", overlay=true)

// Input parameters
k = input.int(14, title="%K Length")
d = input.int(3, title="%D Length")
smoothK = input.int(3, title="Smoothing")

// Calculating Stochastic Oscillator
kValue = ta.sma(ta.stoch(close, high, low, k), smoothK)
dValue = ta.sma(kValue, d)

// Overbought and Oversold levels
obLevel = 80
osLevel = 20

// Buy and Sell Conditions
buySignal = ta.crossover(kValue, dValue) and kValue < osLevel
sellSignal = ta.crossunder(kValue, dValue) and kValue > obLevel

// Plotting the Stochastic Oscillator
plot(kValue, title="%K", color=color.blue)
plot(dValue, title="%D", color=color.orange)
hline(obLevel, "Overbought", color=color.red)
hline(osLevel, "Oversold", color=color.green)

// Plot Buy and Sell Signals on Candlestick Chart
plotshape(buySignal, location=location.belowbar, color=color.green, style=shape.labelup, title="Buy", text="Buy")
plotshape(sellSignal, location=location.abovebar, color=color.red, style=shape.labeldown, title="Sell", text="Sell")