The GannChart.ai Blog

Gann Methodology, Made Precise

Deep technical walkthroughs of W.D. Gann's planetary methods, Square of Nine, astro confluence, and the math behind the trading techniques used in our platform.

Do Retrograde Stations Mark Market Turns? We Tested 264 of Them

We ran 264 planetary stations against 21 years of daily data on gold, the S&P 500, WTI crude and the Dow, across 48 test configurations. They hit swing pivots no more often than random dates. The full method, the data, the reason it looks like it works anyway, and the part that still survives.

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Gann's Square of Nine, Built from First Principles

The geometry, the math, and the trading rules of the SQ9 — explained from scratch with a live wheel you can click, a time-and-price calculator, and a worked example on TSLA's $489 December 2024 high (which the method projected within $0.40).

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How to Read Gann Planetary Lines on Gold (2026 Walkthrough)

The exact formula, the noon-UTC ephemeris standard, the rules for retrogrades and intraday interpolation, and a worked example for gold near $2,650 — including a price-unit calculator, a longitude-to-price slider, and a daily drift simulator you can scrub.

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More articles coming Heliocentric vs geocentric · The price unit, from scratch · Confluence trading rules