When crossing above 0 - close short, open long
When crossing below 1 - close long, open short
For crypto/fiat and any timeframe
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.