What we use:
• as a trend filter
Firstly we make simple moving. It is the white line which appears on the chart.
Then we make second line (named: band2) on the chart by multiplying linreg and value difference.
The third step is to ad as a trend filter.
The trade open when price is below band2, but still upper than Hullma. The trade close when price again upper than linreg.
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.