Positive and Negative Number Formatting
To construct a custom format for currency or numbers that treats positive and negative numbers differently, use a semi-colon and a space in the Format attribute to delineate two formats:
For example, the Format value shown above will show positive numbers with a comma as a thousands separator. It will show negative numbers in the same way but also enclose them in parenthesis. Note the semi-colon and space which separate the positive and negative formats.
You can also use the Conditional Class element, beneath any Label element that displays numeric data, to display negative numbers in a different color than positive numbers.