Conversion of built-in indicator Stochastic RSI from Pine (Tradingview) to MQL4-indicator

Conversion of the built in indicator with exactly the same input parameters from Pine inTradingview to MQL4 for MT4. This indicator is going to be a part of an EA and as such I will need to be able to use and change the input parameters.

The code from Tradingview is freely available and looks like this:

//@version=3
study(title="Stochastic RSI", shorttitle="Stoch RSI")
smoothK = input(3, minval=1)
smoothD = input(3, minval=1)
lengthRSI = input(14, minval=1)
lengthStoch = input(14, 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, color=blue)
plot(d, color=orange)
h0 = hline(80)
h1 = hline(20)
fill(h0, h1, color=purple, transp=80)

Most important is that the indicator will show the lines as defined above, and the 80-20 levels. The fill is not so important.