Your odds start from the admit rate in the round you apply in, then each thing known about how that college treats someone like you (sex, where you live, your score) multiplies your odds (the odds, not the percentage, so nothing can pass 100%). Rounds and rates come from each college's Common Data Set and published early-round numbers.
Deadlines come from the same filings: a round whose closing date has passed is not offered. Suggestions weigh your odds, the college's rank, and a flag ⚑ for very low yield (most admitted students go elsewhere).
Tactics come from students' own posts: self-reported, unverified, and never used in the odds.
Every number and its basis: odds.json