SYMPTOM:
In Strategy Developer 10.x, five kinds of number formatting are available for negative numbers of Fixed, Currency, and Percent type of numbers in Metric editor and Grid formatting. However, only four kinds are available for negative numbers of Fixed, Currency and Percent type of numbers in Graph.
Take the Fixed type as an example as shown below:
In Grid report, there are five kinds of number formatting, as shown below:

In Graph report, there are only four kinds of number formatting as shown below. The first screenshot is for the number formatting of Axes and the second screenshot is for the number formatting of data labels.


CAUSE:
This is a known issue in Strategy Developer 10.x.
ACTION:
Strategy will continue to investigate and post updates as soon as they are available.