# Waves: Comparing Two Time Periods

Statistics for a data stream between two time periods can be compared by:

1) selecting the desired data stream,

2) adding cursors so that there are either three or four cursors present,

3) selecting Stats -> Signal Stats or Stats -> Signal Stats Over Time.

- Using three cursors will generate comparison statistics for adjacent time periods.

- Using four cursors will generate comparison statistics between cursor pairs.

- The highlighted regions shown when the Stats menu is present indicates the regions that will have statistics generated.

- The generated chart on top corresponds to the time period on the left.

- The generated chart on the bottom corresponds to the time period on the right.

Demo Video (1:02):