Which coordinates a drawing's anchors are in. 'data', the default, is time
and price: the drawing moves with the bars when the chart pans or zooms.
'viewport' pins it to the screen: its anchors are fractions of its pane's
plot, so pan and zoom leave it where it is and a resize keeps it in
proportion.
Which coordinates a drawing's anchors are in.
'data', the default, is time and price: the drawing moves with the bars when the chart pans or zooms.'viewport'pins it to the screen: its anchors are fractions of its pane's plot, so pan and zoom leave it where it is and a resize keeps it in proportion.