Silver people keep talking about the gold:silver ratio. The ratio is around 85:1 on a spot basis as this is being written, having averaged 85:1 in October. Commentators, producers, and others keep saying that whenever the ratio has gotten to 80:1 in the past it has quickly reversed and fallen sharply as silver has gained value relative to gold.

That is almost true.

http://cpmgroup.com/files/CPM%20Market%20Commentary%202018-5%2C%20Gold%20Silver%20Ratio%20Realities%2C%202018-11-20.pdf