Negative forecast values can be useful but this depends on the significance of the forecast key figure.
For example, negative forecast values occur when the historic data shows a declining trend and you have selected a forecast model with a trend component.
In other cases negative forecast values are not desirable.
Negative forecast values that are not meaningful include, for example, certain quantity key figures such as a quantitative warehouse inventory in units.
Negative forecast values are replaced with the value 0.
Choose this option to make sure that all forecast values are always greater than or equal to 0.