On alerts v2, you'll have more flexibility to define when to be alerted about viral stories.
First of all, you can tailor your settings towards two dimensions: Time & Engagement.
This means that you can set up rules based on the engagement your content had over a specific period of time.
Time dimension covers:
- Daily, Weekly & Monthly visits;
whereas engagement dimension covers:
- Share Rate, and
- Virality Score
Combine the two of them, and you can come up with a query like: "Alert me about any article with more than 10,000 visits this week and more than 1,000 shares on Facebook or 500 shares on Twitter."