Gann Grid

A Gann Fan draws one ray per angle from a single point. The grid does something different: it tiles the chart with parallel 1×1 lines in both directions, rising and falling, so the 1×1 from every pivot on the lattice is present at once.

The output is the intersections. Each one is a price and a date at which a rising 1×1 from one pivot meets a falling 1×1 from another. That coincidence — price advancing at the same rate as time from one origin, declining at the same rate from another — is Gann’s construction for a time-and-price turning point.

The two anchors define one cell: the price and time distance the 1×1 covers. Every other line is that cell repeated, so the whole lattice is fixed by the single measurement you actually make, and adjusting the cell rescales all of it at once.

The rising and falling lines are drawn at the slope the cell implies, never at a literal 45°. This matters more than it sounds.

1. 1
   Click the pivot

   A significant high or low. The 1×1 pair through this point is drawn in the accent colour, because it is the line the rest of the lattice is generated from.
2. 2
   Drag out one cell

   Set the price and time distance the 1×1 covers. Fit it so the rising line follows the market's own rate of advance — that is the same judgement you make when placing a Gann Fan, and it is what makes the lattice mean anything.

• The intersections are the tool’s output, not the lines. Mark the ones near current price and current time; those are the candidate turning coordinates.
• The 1×1 through the pivot is the reference. Price above the rising line is in an uptrend by Gann’s definition; a close below it is the trend-character change the method turns on.
• Price riding one diagonal for several bars and then jumping to the next is the lattice’s version of angle rotation: the trend has changed speed by exactly one cell.
• Where an intersection coincides with a prior swing point, the cell is well chosen. Where past extremes fall between intersections, it is not — change the cell, not the density.
• Turn cell boundaries on when you need to count cells, and off when reading the diagonals. The boundaries are scaffolding; the diagonals are the content.

Reverse mirrors the lattice vertically, so a grid built off a low reads off a high without being redrawn. It carries the same meaning here as on the Gann Fan, which is deliberate: one toggle, one behaviour, across the family.

• 1.How to Make Profits in Commodities — W.D. Gann (1942)
• 2.45 Years in Wall Street — W.D. Gann (1949)
• 3.Gann Angles — StockCharts ChartSchool