Tradingview - Pine Script - How is regression channel can be replicated in excel.

Dear ALL Pine Script Experts,
I seek your views on how is it possible to generate linear regression channel (2 Std Dev range) in Excel or google sheet.
Linear regression function is available in both. But 2SD values calculated are not matching values shown in chart.

Theoretically, What can be steps for calculating SD of regression line.

If anyone give inputs I will work around and share sheets to see if results matches with Tradingview
regression channel Std Dev.

Thanks
Robin

Hey Robin

Check if the linereg formula (https://www.tradingview.com/pine-script-reference/v5/#fun_ta{dot}linreg) is the same as the one used in Excel

linreg = intercept + slope * (length - 1 - offset), where intercept and slope are the values calculated with the least squares method on source series.