Each line rebased to 100 at the start of the window, so you compare shape, not price. AlfaCat Composite is an equal-weight index of every US stock and ETF in the book, rebuilt whenever the book changes — the line names its constituent count, because a basket that grew from 75 names to 534 is not the same index it was.

Reference data for your own analysis — not a recommendation. End-of-day figures; the market moves on.