On 20th March 2020 we published a forward-looking ratio table for the start of the April expiry on the 23rd.
The closing price for the SPX on that Friday was 2304.92.
The pertinent ratios that we published were DR at 2345 and B1 at 2195.
The market on Monday opened at 2290.71, gapping down below DR, making B1 the next level of support.
As you can see from the table opposite what the SPX did that day.
Worth noting that the open, and market low, the next day was 2344.44.
We can’t say why knowing the ratio will help you, because we don’t know what you do, but all we can say, is if you want to be aware of the biggest influence on benchmarks, then this should be of interest.