# Indicator catalog

10 order flow indicators, computed live from the trades. Each page covers the parameters, the data you receive and example messages.

- [Fathom Trades](https://fathomcharts.com/docs/indicators/big-trades.md): Size leaves a trace. Isolate aggressive orders above your threshold and see exactly where they hit the market.
- [Fathom Footprint](https://fathomcharts.com/docs/indicators/footprint.md): Look inside the candle. The raw detail, price by price: volume traded at the bid and the ask, to read the pressure on both sides.
- [Fathom Zones](https://fathomcharts.com/docs/indicators/effort-zones.md): See where the market pushed with conviction. Fast moves backed by delta become buyer or seller effort zones that price comes back to test.
- [Fathom Walls](https://fathomcharts.com/docs/indicators/liquidity-walls.md): Some levels hold, again and again. Spot the ones buyers or sellers keep defending.
- [Fathom Flow](https://fathomcharts.com/docs/indicators/flow-tracker.md): Is that volume burst actually moving price? Accelerations, exhaustions, slowdowns and absorption levels put every move in context.
- [Fathom Imbalances](https://fathomcharts.com/docs/indicators/imbalances.md): Where the footprint shows every number, Imbalances keeps only the signal: when one side overwhelms the other on several levels in a row, the closed candle leaves a zone on the chart.
- [Fathom VWAP](https://fathomcharts.com/docs/indicators/vwap-bands.md): Keep price in perspective. VWAP and its bands show where the market sits against everything traded this session.
- [Fathom Levels](https://fathomcharts.com/docs/indicators/key-levels.md): Your reference levels, always in view. Open, extremes and VWAP frame your read of the session.
- [Fathom Profile](https://fathomcharts.com/docs/indicators/session-profile.md): See where trading concentrates. From the session’s volume by price, Fathom Profile computes the POC, the value area (70% of the volume by default), VWAP and its standard deviation, bar by bar.
- [Fathom Opening](https://fathomcharts.com/docs/indicators/opening-range.md): Set the frame from the open. Track the opening range bounds, then the projections published once price breaks out.

## Indicator names

On the site, each indicator goes by its Fathom name. The API only knows its id: that is what you send in `indicator`. The catalog (`GET /v1/indicators`) also gives a descriptive `name`: it is not used in requests, and the SDK only uses it in the comment of the generated types, which it names after the id (`big-trades` → `BigTradesParams`, `BigTradesData`).

| Name on the site  | API id            | Catalog name field |
| ----------------- | ----------------- | ------------------ |
| Fathom Trades     | `big-trades`      | Big Trades         |
| Fathom Footprint  | `footprint`       | Footprint          |
| Fathom Zones      | `effort-zones`    | Effort Zones       |
| Fathom Walls      | `liquidity-walls` | Liquidity Walls    |
| Fathom Flow       | `flow-tracker`    | Flow Tracker       |
| Fathom Imbalances | `imbalances`      | Imbalances         |
| Fathom VWAP       | `vwap-bands`      | VWAP Bands         |
| Fathom Levels     | `key-levels`      | Key Levels         |
| Fathom Profile    | `session-profile` | Session Profile    |
| Fathom Opening    | `opening-range`   | Opening Range      |

The catalog is also available from the API, with the JSON schemas of each indicator: `GET /v1/indicators`.