Trading View has grown on me and totally taken over from Stock Charts. I decided to carry both through the second half of the year but I think I will decline my renewal on SC next month.
The line on the last chart is also part of the Liner Regression channel. It is a linear regression line although I can't quite figure out how it is constructed. It's a freebie on TV. Search for Linear Regression under the indicators and then select the one named Lin Reg ++ [Lucem Anb] There is a buy/sell signal associated with the change in color of the line but I turn that off.