I thought I would add my two cents after making & tweeting some similar long term charts:

(1/2) I have some interesting charts for you guys: imgur.com/a/J2NZD

Both are the same. All are super powerful trendlines.

(2/2) Remember, crowd psych and manipulation will make you believe the trends are over. They aren't, until fully confirmed (closed candles)

Ultimately, I think these trendlines are of supreme importance, and it is difficult to know which are superior (the linear or log). However simply remembering it takes a long time and much capital to exit them, is your greatest fall back.