# Volume Unusualness

`GET` `https://api.unusualwhales.com/api/stock/{ticker}/unusualness`

How unusual the ticker's volume is today vs its own trailing ~90 trading days, as a percentile (0-100)
and decile (1-10) for both regular-session stock volume and total (call + put) option volume. This is
outlier-robust and comparable across names, unlike a raw volume-vs-average ratio. A metric is null when
fewer than 30 trailing days of history are available. Defaults to the last market day.


## Authentication

```
Authorization: Bearer YOUR_API_KEY
```

## Path Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `ticker` | SingleTicker | Yes | A single ticker |


## Response (200)

| Field | Type | Description |
|-------|------|-------------|
| `date` | General ISO Date | An ISO date. |
| `opt_samples` | integer | Trailing days used for the option-volume percentile. |
| `opt_vol_decile` | integer | Option-volume decile (1-10). |
| `opt_vol_pctile` | number | Option-volume (call+put) percentile (0-100) vs the ticker's own ~90-day history. |
| `stock_samples` | integer | Trailing days used for the stock-volume percentile. |
| `stock_vol_decile` | integer | Stock-volume decile (1-10). |
| `stock_vol_pctile` | number | Stock-volume percentile (0-100) vs the ticker's own ~90-day history. |


## Example

### curl

```bash
curl -X GET "https://api.unusualwhales.com/api/stock/{ticker}/unusualness" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json"
```

### Python

```python
import http.client

conn = http.client.HTTPSConnection("api.unusualwhales.com")
headers = {"Authorization": "Bearer YOUR_API_KEY", "Accept": "application/json"}
conn.request("GET", "/api/stock/{ticker}/unusualness", headers=headers)
response = conn.getresponse()
print(response.read().decode("utf-8"))
```

## Response Example

```json
{
  "data": {
    "date": "2026-09-02",
    "opt_samples": 91,
    "opt_vol_decile": 4,
    "opt_vol_pctile": 34.1,
    "stock_samples": 91,
    "stock_vol_decile": 9,
    "stock_vol_pctile": 81.3
  }
}
```