RSI on Bollinger Bands by Snabbel

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// @author Snabbel
// RSI on Bollinger Bands
study(title = "RSI on Bollinger Bands", shorttitle="RSI+BB")
source = close
RSI_length = input(14, minval=1)
BB_length = input(50, minval=40, maxval=50)
BB_stdDev = input(2.1, minval=2.0, maxval=2.1)
HighlightBreaches=input(true, title="Highlight Oversold/Overbought?", type=bool)

rsi_s = rsi(source, RSI_length)
plot(rsi_s, color=black, linewidth=2)

band4 = hline(80, title="Upper Line", linestyle=dashed, linewidth=3, color=red)
band3 = hline(55, title="Upper Line", linestyle=dashed, linewidth=3, color=red)
band2 = hline(50, title="Upper Line", linestyle=dashed, linewidth=3, color=red)
band1 = hline(45, title="Upper Line", linestyle=dashed, linewidth=3, color=red)
band0 = hline(20, title="Lower Line", linestyle=dashed, linewidth=3, color=lime)
fill(band1, band2, color=purple, transp=90)
fill(band2, band3, color=purple, transp=90)

bb_s = rsi_s
basis = sma(bb_s, BB_length)
dev = BB_stdDev * stdev(bb_s, BB_length)
upper = basis + dev
lower = basis - dev
plot(basis, color=red)
p1 = plot(upper, color=blue)
p2 = plot(lower, color=blue)
fill(p1,p2, blue)

b_color = (bb_s > upper) ? red : (bb_s < lower) ? green : na
bgcolor(HighlightBreaches ? b_color : na)
and how about fisher transform in RSI ?
would you share you programming skills for a test on it?
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