Configure the Chart widget as follows:

1. Configure general parameters (see General widget settings).
   

2. Select the chart type (1).

3. Select the field that will be on the chart along the X axis (2).

4. Select the field that will be on the graph along the Y axis (3).

5. If non-numeric fields are selected, then in the Value op field, select count (4) - the number of events will be counted. If a numeric field is selected, then you can select the sum, average, minimum and maximum value.

6. If there should be several series in the chart, select the field by which they should be aggregated (5).

   The example on the image above shows a chart with the number of events from all cameras depending on time.

   
   

7. In order to be able to change the chart scale when working with it, activate the Brush parameter (6).
8. Click Save.