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.
//Colors candles with body less than 50% of range of candle study(title = "<50% body candle", overlay = true) candr = high-low bodyr = open-close borat = (bodyr*100/candr) barcolor (borat>-50 and borat <50 ? white : na)