Looking at the long term Gold / Crude Oil ratio we see that price has been capped to the upside by the region marked by the box.
I'm sure these ratios are not coincidence, but rather watched by institutional investors. You can see a touch of the trend-line triggered a seven consecutive week sell off in crude last October which resulted in a 33% decline in price.
Gold ratios might also be important as historically gold has maintained it's value vs. fiat currencies which have seen a 98% decrease in purchasing power over the last 100 years (300 ounces of gold would have bought you a house in 1960, the same 300 ounces could tsill buy you a house today even though it would cost 10 x more in terms of dollars) "Gold Is Money, Everything Else Is Credit" JP Morgan ---> Such as bank notes whose value can be easily manipulated by expanding / contracting supply which they created for the rest of us.
Since 1991 this resistance area has only been broken once and it was more of a spike (false break) than a maintained move. Right now price is in the box which makes it "expensive" related to crude. If we believe this ratio will be maintained moving forward, a large move up in the price of gold (I expect is going to happen) would have to be in tandem with a relative price increase in crude (likely once we see the USD begin to fall) So far gold has made all it's gains off the Aug 2018 lows with the USD making new highs.
Just my opinion... Some might consider it interesting to observe.