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<p id="isPasted"><strong><em>Gann angles</em></strong> are named after their creator W.D. Gann. Gann believed the angles could predict future price movements based on geometric angles of time versus price. Gann was a 20th-century market theorist. The validity and usefulness of his theories, however, are subject to debate.</p><p>Several Gann angles used together make up the Gann fan.</p><ul style="list-style-type: square;"><li>Gann angles are based on the 45-degree angle, known as the 1:1 angle. Gann believed the 45-degree angle is important and trends above it are strong and trends below it weaker.</li><li>Gann angles are applied from price bottoms extending upwards or from price tops extending downwards. …</li></ul>