# bollinger_width

`(bollinger_upper − bollinger_lower) / bollinger_middle`. Normalized width — measures volatility regime. Narrow widths often precede expansion (see `bollinger_squeeze` in flags.ts).

A numeric signal column on the Tickerbot computed state table (20,798+ ticker rows) — computed by the platform, queryable by bare name across the API. Values are NULL on rows the signal doesn't apply to.

- Group: Technicals
- Category: Volatility & bands
- Type: numeric
- Update cadence: post-close daily
- Intervals: 1d
- Universe: all tickers
- History: full · since 2003
- Nullable: yes

## Query it

Every applicable form factor, grouped by endpoint family. Response payloads are real captures, sampled 2026-08-18 and trimmed; your run's values and dates will differ.

### Use signals — `/v2/signals/{signal}`

One signal across the market: who matches now, who matched then, and a push when someone starts. (https://tickerbot.io/docs/endpoints/signals.md)

#### Live — every ticker with bollinger_width above a cutoff

```bash
curl -G "https://api.tickerbot.io/v2/signals/bollinger_width" \
  --data-urlencode "condition=> 1.6691" \
  -H "Authorization: Bearer YOUR_KEY"
```

Response (sampled 2026-08-18, trimmed):

```json
{
 "as_of": "2026-08-18T00:23:00.447Z",
 "signal": "bollinger_width",
 "condition": "> 1.6691",
 "universe": null,
 "count": 2,
 "results": [
  {
   "ticker": "FGIWW",
   "name": "FGI Industries Ltd. Warrant",
   "value": 6.7252
  },
  {
   "ticker": "NXTT",
   "name": "Next Technology Holding Inc. Ordinary Shares",
   "value": 6.0789
  }
 ]
}
```

#### As-of — the same read at a past date

```bash
curl -G "https://api.tickerbot.io/v2/signals/bollinger_width" \
  --data-urlencode "condition=> 1.6691" \
  -d "asof=2026-05-20" \
  -H "Authorization: Bearer YOUR_KEY"
```

Response (sampled 2026-08-18, trimmed):

```json
{
 "as_of": "2026-05-20",
 "signal": "bollinger_width",
 "condition": "> 1.6691",
 "universe": null,
 "count": 2,
 "results": [
  {
   "ticker": "BRK.A",
   "name": "Berkshire Hathaway Inc.",
   "value": 35909.06012241193
  },
  {
   "ticker": "X:BTCUSD",
   "name": "Bitcoin",
   "value": 6549.301158648275
  }
 ]
}
```

#### Subscribe — webhook when a ticker starts matching

```bash
curl -X POST "https://api.tickerbot.io/v2/signals/bollinger_width/subscribe" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_KEY" \
  -d '{"condition": "> 1.6691", "target_url": "https://example.com/hooks/tickerbot"}'
```

Returns 201 with the created webhook — the same shape as GET /v2/webhooks/{id}, plus a one-time signing_secret for HMAC verification.

### Use scan — `/v2/scan`

The whole market through a WHERE clause — this signal composed freely with any other column. (https://tickerbot.io/docs/endpoints/scan.md)

#### Live — the whole market, ranked by this column

```bash
curl -G "https://api.tickerbot.io/v2/scan" \
  --data-urlencode "q=bollinger_width IS NOT NULL" \
  -d "order=bollinger_width" -d "columns=bollinger_width" \
  -H "Authorization: Bearer YOUR_KEY"
```

Response (sampled 2026-08-18, trimmed):

```json
{
 "as_of": "2026-08-18T00:23:03.742Z",
 "query": {
  "q": "bollinger_width IS NOT NULL",
  "limit": 2,
  "order": "bollinger_width",
  "dir": "desc",
  "fields": [
   "bollinger_width"
  ],
  "full": false,
  "universe": null,
  "asset_class": null
 },
 "count": 2,
 "results": [
  {
   "ticker": "FGIWW",
   "name": "FGI Industries Ltd. Warrant",
   "asset_class": "stocks",
   "asset_type": "WARRANT",
   "price": 0.089,
   "day_change_pct": -0.1909,
   "gap_pct": null,
   "relative_volume": null,
   "market_cap": null,
   "bollinger_width": 6.7252
  },
  {
   "ticker": "NXTT",
   "name": "Next Technology Holding Inc. Ordinary Shares",
   "asset_class": "stocks",
   "asset_type": "CS",
   "price": 5.948,
   "day_change_pct": -0.0898,
   "gap_pct": -0.0298,
   "relative_volume": null,
   "market_cap": 9625800,
   "bollinger_width": 6.0789
  }
 ]
}
```

#### As-of — the same scan at a past date

```bash
curl -G "https://api.tickerbot.io/v2/scan" \
  --data-urlencode "q=bollinger_width IS NOT NULL" \
  -d "order=bollinger_width" -d "columns=bollinger_width" \
  -d "asof=2026-05-20" \
  -H "Authorization: Bearer YOUR_KEY"
```

Response (sampled 2026-08-18, trimmed):

```json
{
 "as_of": "2026-05-20",
 "query": {
  "q": "bollinger_width IS NOT NULL",
  "asof": "2026-05-20",
  "interval": "auto",
  "limit": 2,
  "order": "bollinger_width",
  "dir": "desc",
  "fields": [
   "bollinger_width"
  ],
  "full": false,
  "universe": null,
  "asset_class": null
 },
 "count": 2,
 "results": [
  {
   "ticker": "BRK.A",
   "name": "Berkshire Hathaway Inc.",
   "asset_class": "stocks",
   "asset_type": "CS",
   "price": 720840,
   "day_change_pct": 0.03330557868442965,
   "gap_pct": 0.05550929780738274,
   "relative_volume": 1.7831074035453596,
   "market_cap": null,
   "bollinger_width": 35909.06012241193
  },
  {
   "ticker": "X:BTCUSD",
   "name": "Bitcoin",
   "asset_class": "crypto",
   "asset_type": null,
   "price": 77547.62,
   "day_change_pct": 0.09245444943651589,
   "gap_pct": -0.000012907224559909754,
   "relative_volume": 0.937883233067203,
   "market_cap": null,
   "bollinger_width": 6549.301158648275
  }
 ]
}
```

#### Subscribe — webhook on a market-wide condition

```bash
curl -X POST "https://api.tickerbot.io/v2/scan/subscribe" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_KEY" \
  -d '{"q": "bollinger_width > 1.6691", "target_url": "https://example.com/hooks/tickerbot"}'
```

Returns 201 with the created webhook object; deliveries carry the tickers matching the condition at each evaluation.

### Use series — `/v2/series`

Its history over time, on one aligned grid. (https://tickerbot.io/docs/endpoints/series.md)

#### History — the column on an aligned time grid

```bash
curl "https://api.tickerbot.io/v2/series?tickers=AAPL,MSFT&columns=close,bollinger_width" \
  -H "Authorization: Bearer YOUR_KEY"
```

Response (sampled 2026-08-18, trimmed):

```json
{
 "as_of": "2026-08-18T00:23:06.710Z",
 "interval": "1d",
 "tickers": [
  "AAPL",
  "MSFT"
 ],
 "columns": [
  "close",
  "bollinger_width"
 ],
 "count": 6,
 "series": {
  "AAPL": [
   {
    "t": "2026-08-12",
    "close": 302.25,
    "bollinger_width": 0.1588
   },
   {
    "t": "2026-08-13",
    "close": 305.26,
    "bollinger_width": 0.1604
   },
   {
    "t": "2026-08-14",
    "close": 305.93,
    "bollinger_width": 0.1602
   }
  ],
  "MSFT": [
   {
    "t": "2026-08-12",
    "close": 492.43,
    "bollinger_width": 0.4448
   },
   {
    "t": "2026-08-13",
    "close": 496.88,
    "bollinger_width": 0.4535
   },
   {
    "t": "2026-08-14",
    "close": 495.4,
    "bollinger_width": 0.4455
   }
  ]
 }
}
```

## Related signals (Volatility & bands)

- [at_bollinger_lower](https://tickerbot.io/docs/signals/at_bollinger_lower.md)
- [at_bollinger_upper](https://tickerbot.io/docs/signals/at_bollinger_upper.md)
- [atr_14](https://tickerbot.io/docs/signals/atr_14.md)
- [atr_percent](https://tickerbot.io/docs/signals/atr_percent.md)
- [bollinger_lower](https://tickerbot.io/docs/signals/bollinger_lower.md)
- [bollinger_middle](https://tickerbot.io/docs/signals/bollinger_middle.md)
- [bollinger_pct_b](https://tickerbot.io/docs/signals/bollinger_pct_b.md)
- [bollinger_squeeze](https://tickerbot.io/docs/signals/bollinger_squeeze.md)
- [bollinger_upper](https://tickerbot.io/docs/signals/bollinger_upper.md)
- [vwap_lower_band](https://tickerbot.io/docs/signals/vwap_lower_band.md)
- [vwap_upper_band](https://tickerbot.io/docs/signals/vwap_upper_band.md)

---

Full catalog: https://tickerbot.io/docs/signals.md · Schema: https://tickerbot.io/docs/schema.md · Interactive: https://tickerbot.io/explore?signal=bollinger_width · HTML: https://tickerbot.io/docs/signals/bollinger_width/