Watchlist behaviour explained

Four things that are working as intended. Prices tick during regular hours, and the list holds steady pre- and post-market to match the chart's session. Only the digits that changed light up on a tick, and the highlight holds until the next real change. A faint-highlighted row is your last pick, shown when you've charted a symbol that isn't on the list so you don't lose your place. And deleting a section removes the symbols it owns, with a confirm that counts them.

The last remaining list can't be deleted.