red line are downtrend and green line are up trend
using len 1 you can make it longer or shorter (I put it on length of 40 but you can change that to what ever you want )
Similar to SAR it can give us the trends of buy and sell only by doing it by the linear way
try longer length to see if it smooth the signal
4 hour graph
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.