Its not up to one witness, since it is still a median price for one hour, collected from the feed from the top witnesses. But then it looks at the median hourly prices from the last 3.5 days (84 data points) and choses the lowest.

Yeah... I still don't get it.

What is a "top witness"?

Oh wait maybe I get it...
Yeah there are 84 data points (all medians) and it just takes the lowest one.
Simple enough but there are a lot of ways to misinterpret how it was being explained.

Thanks for the help!