Donchian Oscillator

This oscillator displays the proportions (ratios) of the closing price from the 20-period Donchian high & low prices. Use for breakouts (not intended for mean reversion).

Dark green = new 20-period high
Dark red = new 20-period low

リリースノート:

Altered the coloring scheme to be more precise and "readable".
Added lookback inputs for each plot.