ADR in wyckoff

So I recently started using wyckoff systems in my trading and I was able over the past year to catch some massive RR trades but I am never able to catch it exactly at the spring.After doing some reading I saw that alot of wyckoff traders use the ADR to help calculate the range to know when the spring drops to pushes up so they will have a near sniper entry.

Any wyckoff traders here who can explain how you use the ADR and what settings do you use