OptionalaxisAxis label font size in px (default 11).
OptionalcrosshairBackground of the crosshair value tags (defaults to crosshair).
OptionalcrosshairShow the crosshair price/time value tags (default true).
OptionalcrosshairCrosshair line dash style (default 'dashed').
OptionalcrosshairCrosshair line width in device px (default 1 = hairline).
OptionalgridGrid line dash style (default 'solid').
1px rule between stacked panes. Subtle: it separates, it does not divide.
Chart theme (palette). A single object drives chart chrome (background, grid, axes, crosshair), series defaults (up/down, line, area gradient, last price), and the trade layer (buy/sell, profit/loss). Renderers read theme colors when a per-series style field is absent, so one theme restyles the whole chart.