# Gravity Heatmap

> Colours the chart by how close each point lies to the rings of the Fibonacci Circles on the chart, brightest where rings of several circles meet.

Updated: 2026-10-24T23:15:41.000Z · https://chartrider.com/docs/indicators/gravity-heatmap/

## What you see
A heatmap over the visible part of the chart, built from the rings of the [Fibonacci Circles](https://chartrider.com/docs/indicators/fibonacci-circles/) indicator. Points on a ring are bright, points halfway between two rings are dark, and where rings of several circles overlap their contributions add up. The colours run from transparent through indigo and teal to amber and gold, relative to the brightest point in view – gold marks the places where the most rings meet.

## Using it
1. Add Fibonacci Circles to the chart.
2. Add Gravity Heatmap and switch **Heatmap** to On. It is off by default, so adding the indicator alone draws nothing.

The heatmap follows the Fibonacci Circles settings: only rings whose level is switched on count, and with Semicircle Mode only the right-hand part of each ring. With more than one Fibonacci Circles indicator, the levels and Semicircle Mode of the first one apply to all.

It is recalculated shortly after you pan or zoom. Nothing is drawn while no circle reaches into the visible range.

## Settings

Open the settings with the slider icon next to the indicator (Indicators, `F3`). Numeric settings can be swept as Step 1 / Step 2 parameters when you run a strategy.

| Setting | Type | Default | Description |
|---|---|---|---|
| Heatmap | Switch | Off | Draws the heatmap. Off by default. Off / On. |
| Fixed Grid (Server Mode) | Switch | Adaptive | Adaptive computes one cell per pixel of the chart area. Fixed uses Grid Columns × Grid Rows for the visible area. Adaptive / Fixed. |
| Grid Columns | Number | `1920` | Number of columns with the Fixed grid. |
| Grid Rows | Number | `1080` | Number of rows with the Fixed grid. |
| Opacity | Slider | `0.45` | Transparency of the heatmap. |
| Radial Fade | Switch | On | Weakens each circle's contribution from its centre outwards, so outer rings count less. Off / On. |
| Fade End | Slider | `0.1` | Strength left at the outermost active ring when Radial Fade is on (0.1 = 10 %). |

## Outputs

This indicator draws on the chart only – it has no values for Trade Setup gates or `use indicator`.