---
title: "Get Signal Events"
method: GET
path: "/api/signals/{signal_name}/events"
tags: ["Trade Signals"]
---

# Get Signal Events

`GET /api/signals/{signal_name}/events`

## 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/signals/{signal_name}/events`
- Auth: HTTP bearer

Time-stamped history of a single signal's scores with direction-flip detection and realized returns.

Provides per-bar snapshots of a component's score, direction, and input context,
plus *forward* realized returns for backtesting and diagnostic overlays.

The returned window always spans the two most-recent regular trading
sessions: the current session plus the previous one when the market is
live, or the two most-recent fully-elapsed sessions otherwise. ``limit``
acts as a safety cap on result size for unusually dense signals.

**Params:**
- `signal_name` — one of: `vol_expansion`, `eod_pressure`, `squeeze_setup`,
  `trap_detection`, `zero_dte_position_imbalance`, `gamma_vwap_confluence`,
  `range_break_imminence`, `market_pressure`, `positioning_trap`,
  `vanna_charm_flow`.  Returns 400 for unknown names.
- `symbol` (default `SPY`).
- `limit` — 1–1000, default 1000 (cap on row count within the session window).
- `horizon` — `"30m"` | `"60m"` | `"120m"` (default `"60m"`); forward window for realized return.

**Returns:**
```json
{
  "underlying": "SPY",
  "signal_name": "vol_expansion",
  "horizon": "60m",
  "rows": [
    {
      "underlying": "SPY",
      "timestamp": "2026-04-22T14:55:00Z",
      "component_name": "vol_expansion",
      "score": 42.31,
      "weighted_score": 0.0846,
      "weight": 0.20,
      "direction": "bullish",
      "direction_flip": true,
      "inputs": { "...context_values snapshot..." },
      "close": 677.12,
      "horizon_close": 678.40,
      "realized_return": 0.00189
    }
  ],
  "count": 100,
  "summary": {
    "flips": 7,
    "bullish": 43, "bearish": 38, "neutral": 19,
    "latest_timestamp": "...",
    "latest_direction": "bullish"
  }
}
```

- `score` — clamped_score × 100; [-100, +100].
- `direction_flip` — `true` when sign changed since previous non-zero row.
- `realized_return` — (horizon_close − close) / close; 6-decimal fractional;
  `null` if no forward quote exists yet.
- `horizon_close` — underlying close at `timestamp + horizon`.

**Trader interpretation:**
- Use `realized_return` to validate direction (bullish rows should average positive returns).
- Low `flips` count = cleaner trend-following signal.
- `direction_flip` markers make great overlay pins on a price chart.

**Page design.** Time-series panel: top line = `score` colored by direction;
bottom histogram of `realized_return`. Triangle glyphs at each `direction_flip`.
KPI row from `summary`.

## Path parameters

- `signal_name` string, required

## Query parameters

- `symbol` string
- `limit` integer
- `horizon` string

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/zerogex/apis/zerogex-api.md) · [All operations](https://skmtc.dev/zerogex/apis/zerogex-api/llms.txt) · [OpenAPI document](https://skmtc.dev/zerogex/apis/zerogex-api/revisions/753b26bf0592?raw)