What the Gann Wheel Actually Is
The Gann Wheel is a charting tool from the 1920s-40s that plots price and time on a circular grid. It's been used in commodity and stock trading for roughly a century. The idea is that markets move in geometric patterns that can be mapped onto angles. This is a misconception you'll run into occasionally online. Someone posts a video or a PDF claiming Gann's wheel "calculates square roots." It doesn't. The geometry of the wheel involves angular divisions of a circle (360 degrees mapped to price levels), and while there are some square-root-like proportions baked into Gann's original methodology, that's not what the physical tool does. It's a visual mapping device, not a calculator. I spent about two weeks in 2019 trying to build a spreadsheet version of this after seeing a forum thread claim it produced "accurate square root pricing targets." The problem wasn't the concept — it was that the math behind it was hand-wavy at best. Gann's own writings are famously cryptic. What he actually did was draw circles, divide them into quadrants, and label the cardinal and ordinal points with price levels. That's it. There's no algorithm that outputs a square root.
One specific edge case I hit: someone had converted the wheel into a Google Sheets template that supposedly "auto-calculates support and resistance using square root proportions." I audited the formulas. The sheet was doing basic arithmetic — adding and subtracting fixed increments — and just calling it square-root math in the UI labels. The output looked plausible on a chart because the increments happened to align loosely with actual price levels, but that's because Gann's original method was always somewhat arbitrary. The wheel doesn't solve for n. It divides a circle. If you want the real deal, here's what you need to know:
- It's a circle divided into 360 degrees. Each degree represents a price unit depending on how you scale it.
- The key angles are 90°, 180°, and 270°. These correspond to the cardinal directions on the wheel — support, resistance, and reversal zones.
- There is no automated calculator. Any tool claiming to compute "Gann square root targets" is either mislabeling simple arithmetic or running a custom script that has no basis in Gann's actual published work.
I tried to find a working download of a genuine Gann Wheel overlay for TradingView back in 2021. Most of what's out there is either a repackaged angle tool or a poorly coded Pine Script that draws lines on a circle and calls it a day. The only reliable way to use this is manually: draw your own circle on a chart, set your scale, and mark the angles. It takes about 5 minutes once you get used to it. The main limitation of the Gann Wheel is that it requires you to pick a starting price and a scale factor, and those choices are entirely subjective. Two traders looking at the same chart will likely draw different wheels and get different "targets." That's the honest answer — it's a visual aid, not a predictive engine. If someone tells you otherwise, they're probably selling you something.
Get the Full Details
