Function: bgcolor()
bgcolor(
color,pane?):void
Shade this bar's background (Pine bgcolor). Call it on the bars it
applies to; a bar it is not called on keeps the chart's own background,
which is Pine's na.
The colour carries its own alpha, so Pine's transp is
color.withTransp(color.red, 90). Two calls on one bar do not composite —
the last one wins — so a script layering zones should decide the colour
itself and call once.
pane names a sub-pane to shade, "" the price pane, exactly as in
plotPane.
Parameters
color
i32
pane?
string = ""
Returns
void