Linear RSI

//@version=5
indicator('Linear RSI')

//inputs
length = input.int(defval=100, minval=1, title='LR length')
length2 = input.int(defval=13, minval=1, title='RSI length')
lag = 0
//input(-1, title="Lag for fast")

overBought = input(80)
overSold = input(20)

//rsi
src = input(close)
Lr = ta.linreg(src, length, lag)
rsi = ta.rsi(Lr, length2)

plot(rsi, color=rsi > overBought ? color.green : rsi < overSold ? color.red : color.silver)
plot(overBought, color=color.new(color.purple, 0))
plot(overSold, color=color.new(color.purple, 0))

//end of this part