[RS]JR Flex Donchian Channel V0R1 — Indicator by RicardoSantos

Experimental:
Request for JR, fixed some stuff...
erroneous functions using highest() when it should be lowest()
missing midline...

Open-source script

In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.

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Want to use this script on a chart?

study("[RS]JR Flex Donchian Channel V0R1", overlay=true)
BB_Length = input(title='BB Length', type=integer, defval=10)
BB_Deviations = input(title='BB Deviations', type=integer, defval=2)
BB_Src = input(title='Source', type=source, defval=close)
//  ||---   BB
BB_Midline = sma(BB_Src, BB_Length)
BB_Deviation = stdev(BB_Src, BB_Length) * BB_Deviations
BB_Upper = BB_Midline + BB_Deviation
BB_Lower = BB_Midline - BB_Deviation
//  ||---   BBW
BB_Width = ((BB_Upper-BB_Lower) / BB_Midline)
//  ||---   DC
DC_Upper = BB_Width <= .025 ? highest(49) :
        BB_Width > .025 and BB_Width <= .050 ? highest(40) :
        BB_Width > .050 and BB_Width <= .075 ? highest(30) :
        BB_Width > .075 and BB_Width <= .100 ? highest(20) :
        BB_Width > .100 and BB_Width <= .125 ? highest(10) :
        BB_Width > .125 and BB_Width <= .150 ? highest(7) :
        BB_Width > .150 ? highest(3) : highest(2)

DC_Lower = BB_Width <= .025 ? lowest(49) :
        BB_Width > .025 and BB_Width <= .050 ? lowest(40) :
        BB_Width > .050 and BB_Width <= .075 ? lowest(30) :
        BB_Width > .075 and BB_Width <= .100 ? lowest(20) :
        BB_Width > .100 and BB_Width <= .125 ? lowest(10) :
        BB_Width > .125 and BB_Width <= .150 ? lowest(7) :
        BB_Width > .150 ? lowest(3) : lowest(2)

pU = plot(DC_Upper, color=blue)
pL = plot(DC_Lower, color=blue)
pM = plot(avg(DC_Upper, DC_Lower), color=black)
fill(pU, pM, color=olive, transp=70)
fill(pL, pM, color=orange, transp=70)