Orientation

{
  orientation: 'vertical',   // default
  // orientation: 'horizontal',
}

Orientation controls which physical sides carry the domain (categories) vs range (values) axes. ChartBuddy remaps axis roles automatically when orientation changes, so you keep the same seriesData and only flip orientation.

Orientation	Domain (categories)	Primary range (values)
vertical	bottom	left
horizontal	left	bottom

Horizontal clustered bar

{
  chartType: 'clusteredBar',
  orientation: 'horizontal',
  isDataTransposed: true,
  seriesData: [/* … */],
  title: { visible: true, text: 'Sources' },
  subtitle: { visible: false, text: '' },
  legend: { visible: false },
}

Give horizontal bars enough height — category labels sit on the left and need vertical room.

More detail: Axes · Orientation & roles.