It displays a log-log plot which is updated after each sample period, i.e. each time the NeTraMet meter is read. Flow duration is plotted on the abscissa (=X axis). The duration d is calculated as
d = l - f
where l is the LastActiveTime and f is the FirstTime value from the record the flow meter keeps, as depicted in Figure 3.4. Each traffic flow is depicted as a symbol in the chart. The format can be specified within the rule file which nifty uploads to the meter upon startup. To display the different flow kinds, all ASCII characters as well as some symbols can be used. This is also configurable via the rule file.