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Short, honest guides to how Prior Moves works and how to read what it predicts. The core tool is free; these explain what the numbers mean and what they do not.

• What Is Bill Ackman Buying Next? How Prior Moves Predicts 13F Moves Before They File
  A 13F shows what Ackman bought up to 45 days ago. How a per-investor model estimates the next likely buy about six weeks before the filing is public, what it does not promise, and where it has been wrong.