It takes a bit of digging to find the definition of the index they’re using.
From their GitHub page: “The data in this repository are the percentage change in seasonally-adjusted job postings since February 1, 2020, using a seven-day trailing average.”
From their GitHub page: “The data in this repository are the percentage change in seasonally-adjusted job postings since February 1, 2020, using a seven-day trailing average.”