OptionalcolorPaints this bar onward in one colour, for a band shaded by something other than which line leads: trend state, a regime, a third series. The run is split at the bar where the colour changes, or at the preceding intersection if the plots cross into that bar. Overrides both point and band gradients.
OptionalgradientPrice-anchored gradient starting at this bar, or at the preceding intersection when the plots cross into it. Undefined uses the band's gradient.
Logical index on the shared time axis (fractional is fine).
One bar's pair of values;
nullwhere either plot has no value yet.