OptionalcolorOptionalfontOptionalfontCap height in px at the plot's natural size, scaled down on a narrow chart so a long word never runs past the edges. Default 64.
OptionalidOptionalopacity0..1. Default 0.08, which reads as present without competing with bars.
The word itself. Kept short: it is read at a glance, not studied.
OptionalzBelow the series by default. A mode marker that covered the candles would be worse than no marker, since the candles are what the mode is about.
Default a neutral grey that works on either theme.