Indicators-Overview.md listed RollingVwap as its own row in the Volume
table (count = 9, total = 72), but Home.md and README.md treat it as
a sub-variant of Vwap (count = 8, total = 71). Drop the standalone row
in Indicators-Overview and fold the rolling variant into the Vwap row.
Warmup-Periods.md keeps both constructors (Vwap::new() and
RollingVwap::new(n) have different warmup periods, which is the whole
purpose of that page) but adds a note explaining that the row count
exceeds the 71 canonical indicators by one.
kingchenc
a10bda188f