Landlords and property managers can't collude on rental pricing. Using new technology to do it doesn't change that antitrust fundamental. Regardless of the industry you're in, if your business uses an algorithm to determine prices, a brief filed by the FTC and the Department of Justice offers a helpful guideline for antitrust compliance: your algorithm can't do anything that would be illegal if done by a real person. Today, the FTC and Department of Justice took action to fight algorithmic collusion in the residential housing market. The agencies filed a joint legal brief explaining that price fixing through an algorithm is still price fixing. The brief highlights key aspects of competition law important for businesses in every industry: (1) you can't use an algorithm to evade the law banning price-fixing agreements, and (2) an agreement to use shared pricing recommendations, lists, calculations, or algorithms can still be unlawful even where co-conspirators retain some pricing discretion or cheat on the agreement.