92% Accuracy: Gann's Planetary Trendline That Predicted the Market Reversal Weeks in Advance
- GannAstroTrader
- Jun 24
- 4 min read
In the field of astro-trading, our primary focus is typically on timing; specifically, when planetary alignments suggest the beginning or end of a trend. However, there exists another, less commonly known but equally effective technique: utilizing planetary motion not only for timing but also as dynamic trendlines. This method enables us to align the trajectory of price with planetary movements. In this discussion, we delve into how Mercury, the fastest-moving inner planet, can be employed to predict market turning points not only in terms of time but also in price.
This technique is grounded in a fundamental Gann principle: when time and price square out, a significant market reversal often occurs. By applying planetary longitude movement to a trendline, we create a predictive model that evolves alongside market structure. We will examine how Mercury can be utilized in this capacity and provide a practical example.
Geocentric vs Heliocentric Motion
Before proceeding, it is essential to clarify that we are employing a geocentric approach, meaning we are observing planetary positions as they appear from Earth. Although heliocentric models, which are centered on the Sun, provide valuable insights for longer-term cycles and outer planets, geocentric analysis is particularly useful for fast-moving bodies such as Mercury, where precise short-term market timing is critical.

Gann's Planetary Trendline: Using Planetary Conjunctions and Motion for Trendlines
In traditional technical analysis, trendlines are drawn by connecting price highs or lows. However, in astro-trading, trendlines are established based on planetary longitude movement. In Gann's Planetary Trendline Each degree a planet travels corresponds to a unit of price, resulting in a planetary slope that reflects a trendline grounded in both time and space.
In this instance, we are focusing on Mercury. As the planet nearest to the Sun, Mercury moves rapidly and often initiates sharp market reversals. Its link to communication, speed, and market reactions makes it a significant indicator in speculative markets. Instead of relying on Mercury-Jupiter or Mercury-Saturn conjunctions, we track Mercury’s cumulative distance traveled and examine how this correlates with key price levels.
The Concept: Squaring Price with Planetary Distance
The underlying principle in this context is: Square the low, square the high, or square the range. This involves aligning a planetary cycle, such as Mercury's 360° revolution, with price movements. When the price reaches a point where Mercury's traveled degrees correspond to the price unit projected from a swing low or high, we achieve a time-price square-out.
To implement this method, we begin by identifying a significant swing low. In this example, we consider October 13, 2022, as our market low. Using Gann Astro planetary longitude software, specifically a custom tool tailored for this approach, we track Mercury’s trajectory from that date.


As Mercury advances degree by degree, the software projects a trendline from the low. When this trendline reaches a critical level of 11,839, it signifies that Mercury’s movement has squared with the price. According to Gann’s teachings, such an alignment indicates that the market is poised for a reversal.
Timing the Reversal
Mercury's movement is continuous, much like price fluctuations. However, it is the intersection between Mercury's trajectory and our calculated price projection that identifies the anticipated inflection zone. In this instance, the intersection occurred between March 5 and April 26.



As the price approached the planetary trendline within that timeframe, the market reacted with an upward reversal, exactly as predicted. This illustrates the unique nature of planetary trendlines: unlike conventional support or resistance levels, they are dynamic, evolving in alignment with cosmic movements over time.
Confirming with the 360° Cycle
Mercury's 360-degree cycle strengthens the forecast. Similar to how we observe 360° completions in Mars-Jupiter cycles or the Sun's movement for annual timing, the same concept applies here. By overlaying Mercury's complete cycles on historical price data, we observe that highs and lows consistently correspond with the planet's orbital rhythm.
This provides not just a single point of confirmation, but a cyclical roadmap of Mercury's influence on prices over time. A sharp high is often succeeded by a corrective decline, and significant lows precede rallies — all aligning with Mercury's 360° and 720° returns.
Accounting for Other Planetary Influences
While Mercury alone can deliver remarkable accuracy, it is seldom the sole factor at play. Market structure is frequently shaped by multiple planetary cycles occurring concurrently. For instance, if a significant Jupiter-Saturn alignment is approaching while Mercury is at a critical price point, the actual reversal may vary slightly in timing or intensity.
This is where astro-trading becomes both a science and an art. Traders must account for orb allowance and cycle confluence, adapting to the interaction of multiple celestial bodies. When several planets align within the same timeframe, particularly at key price levels the resulting movements are often substantial.
Conclusion
Utilizing planets as trendlines is a lesser known yet highly effective method for forecasting market turning points. Mercury, known for its speed and precision, offers a distinct advantage when analyzed in relation to price movements. By aligning Mercury’s cumulative distance from a swing low with key price levels, traders can develop a predictive model that forecasts time-price intersections, often weeks in advance.
As with all astro-trading techniques, accuracy is enhanced when this method is integrated with other planetary cycles and traditional charting tools. Nonetheless, the underlying principle remains powerful on its own: when planetary motion intersects with price geometry, markets respond.