Stochastic RSI

//@version=4
study(title="Stochastic RSI", shorttitle="Stoch RSI", format=format.price, precision=2)
smoothK = input(3, "K", minval=1)
smoothD = input(3, "D", minval=1)
lengthRSI = input(22, "RSI Length", minval=1)
lengthStoch = input(22, "Stochastic Length", minval=1)
src = input(close, title="RSI Source")
rsi1 = rsi(src, lengthRSI)
k = sma(stoch(rsi1, rsi1, rsi1, lengthStoch), smoothK)
d = sma(k, smoothD)
plot(k, "K", color=#2962FF)
plot(d, "D", color=#FF6D00)
h0 = hline(80, "Upper Band", color=#787B86)
h1 = hline(20, "Lower Band", color=#787B86)
fill(h0, h1, color=color.rgb(33, 150, 243, 90), title="Background")


smoothK2 = input(3, "2K", minval=1)
smoothD2 = input(3, "2D", minval=1)
lengthRSI2 = input(14, "RSI Length", minval=1)
lengthStoch2 = input(14, "Stochastic Length", minval=1)
src2 = input(close, title="RSI Source")
rsi12 = rsi(src2, lengthRSI2)
k2 = sma(stoch(rsi12, rsi12, rsi12, lengthStoch2), smoothK2)
d2 = sma(k2, smoothD2)
plot(k2, "K2", color=#2962FF)
plot(d2, "D2", color=#FF6D00)