Reversed Value Axis
Flipping any axis
Setting axis renderer’s inversed property to true will automatically flip its scale, regardless of axis type. Naturally, all series attached to that axis will automatically will accommodate this change.
Moving axis to opposite side of plot area
Similarly, to move the axis to other than default side of the plot area, set its renderer’s opposite property to true.
More about axis’ orientation and position
Prevending labels too close to axis ends
You can specify to remove labels that are too close to axis start or end using renderer’s minLabelPosition and maxLabelPosition properties.
More about axis’ start/end labels
Demo source