0.79× · 20th percentile of all history
Scroll or drag to move the time axis · hold shift for the value axis · drag either slider
1.0 means price sits exactly on its 200-day average. The shaded band is the expanding 10th–90th percentile: what counted as extreme using only the data available at each date.
0.79× · 20th percentile of all history
Every value plotted for a past date could have been computed on that date. Normalised series expand their window rather than scaling against the full history, so nothing here is drawn using information that did not exist yet — which is also why the early years of a normalised series are dropped rather than shown against a range of one.