So I made my own! Trading view does not have the wilshire indice, but it has the Rus 3000, good enough, & the US GDP since 1946 so this is what I am using.
Warren Buffet is famous for liking this so now the idea has its name. Let's call it the Buffet indicator (I doubt the only one that had the idea).
This indicator can be used on any indice thought, even on specific stocks.
You can even use it as a filter with an alarm ( ofc not to be used on its own but patient people can really go far if they ONLY invest when the ratio is at the bottom, just as long as it is in the right companies):
One could invest in the middle of the highest green area (waiting for it to go too low = risk missing out), and add more when it goes to the second green area, for example. You sort it out.
Enjoy! See you on Mars luxury station in 25 years (the one I will build).