There are two lines for each metric you have selected.  

  • The thinner line with the dots is the daily value. This is how your account performed on that day.
    • In the screenshot below the ACoS on January 24 was 16% and there were 1,196 clicks
  • The thicker line is the average performance over the previous 7 days.
    • Over the 7 days before January 24 there was an average of 1,169 clicks per day and average performance of 13%

We recommend looking at the 7 day value most of the time. Daily variations can be big and misleading. Just because one day had high ACOS doesn't mean you need to change your strategy! Most of the time you want to wait for several days of similar performance before you start worrying.