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.
But when a market trends with consecutive blue candles, that could be interpreted as a sign of weakness.This could also be a fake out or a squeeze.