Dinah has the ability to see the likelihood of something occurring in the future, which her power resolves into a percentage chance. She does this by perceiving trillions of possible universes and sorting them into groups based on a single event.
At Coil's insistence, Dinah also demonstrated the ability to pick out a single timeline and interpret it, which was used to see a future where Crawler did not kill her, Coil, and the Travelers. It allowed them to find a situation where they could escape and then employ it.