> ## Documentation Index
> Fetch the complete documentation index at: https://docs.oddpool.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Event OHLCV

> OHLCV bars for every outcome under an event in one request.

OHLCV bars for every outcome under an event in a single request. Works on Kalshi and Polymarket events. Same bar shape as [Market OHLCV](/markets/ohlcv) with one bar series per outcome.

Bars go back to **2026-03-21** for both Kalshi and Polymarket. Events whose markets all resolved before that date won't have history.

For one specific market or arbitrary ids across multiple events, use [Market OHLCV](/markets/ohlcv) — pass the ids you want.

## Parameters

<ParamField path="event_id" type="string" required>
  Kalshi event ticker (e.g. `KXFEDDECISION-26JUN`) or Polymarket event slug.
</ParamField>

<ParamField query="from" type="string">
  Window start (ISO 8601), inclusive. Defaults to 30 days ago. Mutually exclusive with `last`.
</ParamField>

<ParamField query="to" type="string">
  Window end (ISO 8601), exclusive. Defaults to now. Mutually exclusive with `last`.
</ParamField>

<ParamField query="last" type="string">
  Window shorthand, e.g. `14d`, `12h`, `4w`. See [Market OHLCV](/markets/ohlcv) for full syntax. Mutually exclusive with `from`/`to`.
</ParamField>

<ParamField query="interval" type="string" default="1d">
  Bar size: `6h | 1d | 1w | 1m`. Sub-6h granularity is not available.
</ParamField>

`bars[]` and `stats` shape and semantics are identical to [Market OHLCV](/markets/ohlcv) — including nullable bar fields, units of `change_pct` vs `change_1d/7d/30d`, and bar-count behavior of `last=N`.

## Example

<CodeGroup>
  ```bash cURL theme={null}
  curl -H "X-API-Key: your_api_key" \
    "https://api.oddpool.com/events/KXFEDDECISION-26JUN/ohlcv?last=14d&interval=1d"
  ```

  ```python Python theme={null}
  import requests

  response = requests.get(
      "https://api.oddpool.com/events/KXFEDDECISION-26JUN/ohlcv",
      headers={"X-API-Key": "your_api_key"},
      params={"last": "14d", "interval": "1d"},
  )
  event = response.json()
  for outcome in event["outcomes"]:
      print(outcome["market_id"], outcome["outcome_label"], outcome["stats"]["change_pct"])
  ```
</CodeGroup>

## Response

```json theme={null}
{
  "event_id": "KXFEDDECISION-26JUN",
  "exchange": "kalshi",
  "event_title": "Fed decision in Jun 2026?",
  "category": "Economics",
  "scheduled_close_at": "2026-06-18T18:00:00+00:00",
  "interval": "1d",
  "snapshot_cadence": "6h",
  "window_start": "2026-04-21T03:08:44+00:00",
  "window_end": "2026-05-05T03:08:44+00:00",
  "outcomes": [
    {
      "market_id": "KXFEDDECISION-26JUN-H0",
      "outcome_label": "Will the Federal Reserve hold rates at the June 2026 meeting?",
      "status": "active",
      "result": null,
      "stats": { "window_close": 0.95, "change_pct": 6.7416, "change_1d": 0.012, "...": "..." },
      "bars": [
        {"ts": "2026-04-21T00:00:00+00:00", "open": 0.89, "high": 0.91, "low": 0.87, "close": 0.90, "volume": 51230}
      ]
    },
    {
      "market_id": "KXFEDDECISION-26JUN-C25",
      "outcome_label": "Will the Federal Reserve cut rates by 25bps at the June 2026 meeting?",
      "status": "active",
      "result": null,
      "stats": { "window_close": 0.04, "change_pct": -50.0, "change_1d": -0.01, "...": "..." },
      "bars": [
        {"ts": "2026-04-21T00:00:00+00:00", "open": 0.08, "high": 0.09, "low": 0.07, "close": 0.08, "volume": 28104}
      ]
    }
  ]
}
```

<Note>
  Each outcome's `close` is its own market's last YES price, not a normalized event probability. Across an event's outcomes, closes typically sum slightly above 1 (\~1.02–1.08) due to per-market bid/ask spreads — a few percent over is normal and not a data issue.
</Note>

## Errors

| Code  | Reason                                                                                |
| ----- | ------------------------------------------------------------------------------------- |
| `400` | Invalid window or interval.                                                           |
| `404` | `event_id` not in our pipeline, or the event has no markets in our snapshot pipeline. |