---
title: "Api V2 Signals Advanced Confluence-Matrix Get"
method: GET
path: "/api/v2/signals/advanced/confluence-matrix"
tags: ["Trade Signals (v2)"]
---

# Api V2 Signals Advanced Confluence-Matrix Get

`GET /api/v2/signals/advanced/confluence-matrix`

## Request

- Base URL: `https://api.zerogex.io` (the document declares no server; this is the origin it was published from)
- URL: `https://api.zerogex.io/api/v2/signals/advanced/confluence-matrix`
- Auth: HTTP bearer

N×N advanced-signal agreement matrix — pairwise directional confluence over a rolling window.

Shows how often each pair of Advanced Signals points the same direction over the
last N snapshots. Useful for spotting persistent divergences and unusual
breakdowns in normally-correlated signals. Matrix size follows
`_ADVANCED_SIGNAL_NAMES`.

**Logic** (`src/api/database.py`): Joins `signal_scores` and
`signal_component_scores` for the last `lookback` timestamps, filtering to
the Advanced Signals persisted by `AdvancedSignalEngine`. Signs are
bucketed with `neutral_epsilon = 0.02` (±0.02 counts as neutral).
Agreement = same non-zero sign; disagreement = opposite non-zero signs.

**Params:**
- `symbol` (default `SPY`).
- `lookback` — 10–2000, default 120.

**Signals (fixed order):** `vol_expansion`, `eod_pressure`, `squeeze_setup`,
`trap_detection`, `zero_dte_position_imbalance`, `gamma_vwap_confluence`,
`range_break_imminence`, `market_pressure`.

**Returns:**
```json
{
  "underlying": "SPY",
  "lookback": 120,
  "components": ["vol_expansion", "eod_pressure", "...4 more..."],
  "row_order": ["vol_expansion", "eod_pressure", "...4 more..."],
  "matrix": {
    "vol_expansion": {
      "eod_pressure": {
        "observations": 118,
        "active_observations": 92,
        "agreement_count": 74,
        "disagreement_count": 18,
        "neutral_count": 26,
        "agreement_ratio": 0.8043,
        "disagreement_ratio": 0.1957,
        "net_confluence": 0.6087
      }
    }
  },
  "sample_count": 118,
  "latest_timestamp": "2026-04-22T14:55:00Z"
}
```

- `agreement_ratio` — agree / active_observations; 4 decimals; `null` when active == 0.
- `disagreement_ratio` — disagree / active_observations; `null` when active == 0.
- `net_confluence` — (agree − disagree) / active_observations; [-1, +1].

**Trader interpretation:**
- `net_confluence > 0.5` — signals that routinely agree; unexpected divergence is a flag.
- `net_confluence < -0.3` — persistent disagreement pairs; useful early-warning divergences.

**Page design.** N×N heatmap sized to `_ADVANCED_SIGNAL_NAMES`. Color =
`net_confluence` (green +1 → red -1, white neutral). Cell tooltip:
agreement_ratio / disagreement_ratio / observations. Sort rows by average
agreement to surface consensus signals at top, outliers at bottom.

## Query parameters

- `symbol` string
- `lookback` integer

## Response `200`

Successful Response

- EnvelopeAny
  - `data` unknown, required
  - `freshness` Freshness, required: The v2 freshness envelope. Present on every ``/api/v2/*`` response.
    - `evaluated_at` string, date-time, required: When the API evaluated this response (server wall clock, UTC). Endpoint-health signal: advances on every request even when the underlying data is unchanged.
    - `generated_at` string, date-time, required: When the served data was computed. Equals the snapshot stamp for cycle-backed endpoints, or evaluated_at for endpoints computed on demand for this request.
    - `source_timestamp` string, date-time, nullable: Timestamp of the upstream market observation the payload derives from. This is what freshness_status is measured against. Null when the endpoint has no upstream feed or returned no rows.
    - `latest_event_at` string, date-time, nullable: Newest event timestamp present in the payload (last bar, last trade, last scored row). Best-effort on very large responses, which are sampled rather than fully walked.
    - `age_seconds` number, nullable: evaluated_at - source_timestamp, in seconds. Null when source_timestamp is null.
    - `market_session_status` string, required: pre-market | regular | after-hours | closed (US/Eastern).
    - `expected_update_cadence` string, nullable: ISO-8601 duration for how often this endpoint's data is expected to change right now, e.g. PT60S. Null means no updates are expected (weekend, holiday, or a feed that only runs during the session).
    - `expected_update_cadence_seconds` number, nullable: expected_update_cadence as a number of seconds.
    - `cadence_profile` string, required: Identifier of the cadence class this endpoint belongs to, e.g. analytics_cycle. Stable across releases; the seconds behind it may be retuned.
    - `stale_after` string, date-time, nullable: Instant after which this payload should be treated as stale. Null whenever expected_update_cadence is null.
    - `freshness_status` 'fresh' | 'aging' | 'stale' | 'session_closed' | 'static' | 'unknown', required: The rolled-up freshness verdict for one response. ``fresh`` ``source_timestamp`` is within one expected update cadence. ``aging`` Past one cadence but not yet past ``stale_after`` — the grace band that absorbs normal cycle jitter. Not an error; a client that polls faster than the cadence sees this routinely. ``stale`` Past ``stale_after`` while updates *were* expected. This is the actionable state: the feed behind this endpoint is late. ``session_closed`` A feed-backed endpoint whose feed is not due to produce anything right now (weekend, holiday, or a feed that only runs during the session). The payload is the last good value — deliberately NOT reported as ``stale``, because an overnight consumer polling a closed market is not observing a fault and should not page on it. ``static`` The endpoint is not feed-backed at all: completed history, or a result computed from the caller's own inputs. Age here carries no health meaning and never becomes a fault. ``unknown`` No source timestamp could be resolved from the payload (e.g. a pure calculator, an admin endpoint, or an empty result set). A consumer should fall back to ``evaluated_at`` for endpoint health and make no claim about data age.

## Other responses

- `422`: Validation Error

---

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