# Flux Field

> Skylit's proprietary fair-value line, with an inner, an outer and an optional extreme band.

Flux Field is **Skylit's proprietary fair-value line**, with an inner band, an outer band and an optional extreme band around it.

Candles holding above the centre line mean aggressive buyers are in control. A tag of the outer band means price is stretched, which often reads as a mean-reversion spot. Reclaiming or losing the centre line or the inner band frames trend entries and exits.

## Adding the indicator

Open the chart settings panel and use the **Add** button in the Indicators section. Flux Field sits in the **Overlay** group. One instance per chart pane.

## Settings

| Setting | Options | What it controls |
| --- | --- | --- |
| Anchor | **Auto** (default), Session, Week, Month, Quarter, Year | Where the line restarts. Auto is Session on intraday charts and Month on 1D and longer. |
| Center line | Colour, width, style, opacity | Amber, solid, width 2 by default. |
| Inner band | **On** (default), Off | The band nearest the centre line. |
| Outer band | **On** (default), Off | The band beyond the inner band. It draws fainter than the inner band. |
| Extreme band | **Off** (default), On | The band beyond the outer band, the faintest of the three. |
| Bands | Colour, width, style, opacity | One style for all the band lines. Dashed, width 1, in the centre's amber by default. |
| Shading | **Off** (default), On | Fills between each band's upper and lower line. |
| Shading color | Any colour | Follows the band colour until you pick one. |
| Shading opacity | 0% to 100%, **8%** by default | How strong the fill is. |
| Outer band candles | **Off** (default), On | Restyles candles that close beyond the outer band. Above and Below each have Body, Wick and Border colour and opacity, plus Hollow, Classic and Silhouette presets. |
| Price label | **On** (default), Off | The line's name and value on the price axis. |

## Reading notes

- **It starts at the open.** Before the session opens, or before a ticker has its first point of the day, the line stays empty.
- **ES and NQ use SPY and QQQ.** On ES/MES and NQ/MNQ the line is SPY's or QQQ's Flux Field scaled onto the future's price, labelled SPY Flux Field or QQQ Flux Field, regular hours only.
- **Also on the API and MCP.** The same series is available from `GET /v1/underlying/{ticker}/flux-field` and the `flux_field` tool in the [MCP tool catalog](https://www.skylit.ai/docs/mcp/tools).