Chart X Axis Vertical

We are currently using dhtmlxChart v.6.1.5.
We are trying to rotate the x-axis vertically but upon doing so, the whole x-axis line is rotated.
Please see sample image:

We’ve read other posts but mostly from dhtmlxchart version 5.

Unfortunately currently it is not available to rotate the scale text in the dhtmlxChart 6.

Since the dhtmlxSuite 6.4 you are able to rotate the scale labels using the scaleRotate property: