This indicator shows higher than normal when the silver line cross above 0 and lower than normal when below. The green and red oscillators give an indication of trend direction where the wider they are the stronger the trend.
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.