OptionalconnectsTrue for the price series whose last close drives the last-price line.
Paint the items on a bitmap-scope 2D context: the bars in view, and for a
connectsBars renderer the neighbour beyond each edge (DrawItem.edgeX).
On screen the pane reaches this through its render backend
(src/render/backend.ts); the 2D backend calls it as is, and the vector
export calls it directly on the serialising target.
Min/max price contribution of one bar to autoscale.
True for a renderer that draws a segment from each bar to the next (a line, a step, an area, kagi). Its items then carry the nearest bar beyond each edge of the view as well, marked with
edgeX, so the segment that crosses an edge is drawn: a sparse line (a level held for an hour, a position that steps twice a session) would otherwise lose the part that enters from off screen. Such a renderer cuts that segment atedgeX.