“What Are the Odds?” (WATO) is a revolutionary tool at DNApainter.com that helps you figure out where someone with an unknown parent fits into the family tree of their DNA matches. You can compare different options, called “hypotheses” to see which rank the highest. The results allow you to better focus your research efforts and testing dollars. Better yet, it works using only shared cM amounts, so there is no need for a chromosome browser, and you can use matches from any testing company. This talk will provide a general overview of the tool, how to use it, and how to interpret the results.