OptionalcolorDefault a neutral grey that works on either theme.
OptionalfontOptionalfontCap 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.
OptionaltextThe word itself. Kept short: it is read at a glance, not studied.
OptionalvisibleOptionalzBelow 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.
Optional background text. Blank text follows the chart's symbol and interval.