Created
April 30, 2019 06:06
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| study(title="Bollinger Bands Width", shorttitle="BBW") | |
| length = input(20, minval=1) | |
| src = input(close, title="Source") | |
| mult = input(2.0, minval=0.001, maxval=50) | |
| percentage = input(10.0, minval=0.5, maxval=50) | |
| basis = sma(src, length) | |
| dev = mult * stdev(src, length) | |
| upper = basis + dev | |
| lower = basis - dev | |
| bbw = (100 * (upper/lower -1)) | |
| band1 = hline(percentage, color=gray, linestyle=dashed) | |
| band0 = hline(0, color=gray, linestyle=dashed) | |
| fill(band1, band0, color=teal) | |
| plot(bbw, color=blue) |
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