Last year, The CW aired three new scripted TV shows and cancelled two of them. How many will be cancelled or renewed during the 2017-18 season? Stay tuned.

There’s lots of data that network execs look at when deciding whether to renew or cancel a TV series but ratings are the major ingredient. These charts will be updated daily, as new ratings data becomes available.

CW shows (so far): The 100, Arrow, Black Lightning, Crazy Ex-Girlfriend, DC’s Legends of Tomorrow, Dynasty, The Flash, iZombie, Jane the Virgin, Life Sentence, Masters of Illusion, The Originals, The Outpost, Penn & Teller: Fool Us, Riverdale, Supergirl, Supernatural, Valor and Whose Line Is It Anyway?.

Note: If you’re not seeing the updated charts, please try reloading the page. You can also view them here and here.

A couple of notes about these charts:
These figures are updated automatically as new ratings are released. The averages are based on the final national numbers (live plus same day viewing), unless marked with an asterisk (*). For technical reasons, I have to resort them manually so feel free to let me know if I missed something.

Keep in mind that the demo numbers are typically what’s most important to advertisers. Therefore, that’s how the networks measure success. Advertisers pay more for ad time on a show that has a higher demo rating. Because older viewers don’t count? No, it’s because younger viewers watch less traditional TV and are harder to reach.

Demo numbers are typically reported using the 10ths decimal place (2.4, for example). In the averages, I’m using an extra decimal for easier ranking. The networks take into account when shows air on Fridays and Saturdays, nights when TV viewership is lower.

What do you think? Are you surprised by any of the ratings? Which shows should be doing better? Which one do you think will be cancelled next?