Good real-world examples there! (And I was replying to JPW050’s message and chart. You can see at the top right of my message there is an arrow that points to it and you can click back and see it.)
Regarding Gold (and precious metals) one of the metrics I look at is the relationship/ratio between Gold and Silver – which is why most recently I’ve put money into Silver versus Gold as Gold is way overvalued compared to Silver right now.