Reverse engineered RSI

study(title="Reverse Engineering RSI, by Giorgos Siligardos", overlay = true)
Value = input(50, minval=1)
WildPer = input(14,minval=1)
ExpPer = 2 * WildPer - 1
K = 2 / (ExpPer + 1)
AUC = iff(close > close[1], K * (close - close[1]) + (1 - K) * nz(AUC[1], 1), (1-K) * nz(AUC[1], 1))
ADC = iff(close > close[1], (1-K) * nz(ADC[1], 1), K * (close[1] - close) + (1 - K) * nz(ADC[1], 1))
nVal = (WildPer - 1) * (ADC * Value / (100 - Value) - AUC)
nRes = iff(nVal >= 0, close + nVal, close + nVal * (100 - Value) / Value)
plot(nRes, color=blue, title="Reverse Engineering RSI")