This guide is a working manual for antitrust analysis, written for business owners, in-house counsel, and litigators who need to move from instinct to structure. It sets out the statutory architecture, then takes each doctrine in the order a real analysis follows: agreement or unilateral conduct, horizontal or vertical, per se or rule of reason, and what market the conduct occurs in. It covers monopolization and attempted monopolization, exclusive dealing, tying, refusals to deal, and predatory pricing with the proof each requires. Merger review is treated procedurally, from HSR thresholds through Second Requests and remedies. Separate sections address private litigation, standing, damages, limitations, and the exemptions that pull conduct outside the antitrust laws entirely. The guide closes with compliance program design and a step-by-step response protocol for subpoenas, civil investigative demands, and dawn raids.