Bollinger Bands Width
Category: Trend · Updated November 2026
The TAAPI.IO Bollinger Bands Width API returns value, upper band, lower band, middle band values for the Bollinger Bands Width indicator as JSON, for crypto pairs and US stocks. Send an exchange, symbol and timeframe to get real-time or historical data, with no candles to download and no calculations to maintain.
| Spec | Value |
|---|---|
| Endpoint | GET https://v2.taapi.io/indicator/bbw |
| Outputs | value, upperBand, lowerBand, middleBand |
| Markets | Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks |
| Timeframes | 1m to 1w |
| Delivery | REST, bulk and WebSocket |
Get Bollinger Bands Width with one API call
This request returns Bollinger Bands Width for BTCUSDT on 1-hour Binance candles. Add your API key to run it here.
curl -G https://v2.taapi.io/indicator/bbw \ -H "Authorization: Bearer YOUR_API_KEY" \ --data-urlencode "exchange=binance" \ --data-urlencode "symbol=BTCUSDT" \ --data-urlencode "timeframe=1h"
import requests
resp = requests.get(
'https://v2.taapi.io/indicator/bbw',
headers={'Authorization': 'Bearer YOUR_API_KEY'},
params={'exchange': 'binance', 'symbol': 'BTCUSDT', 'timeframe': '1h'},
)
print(resp.json())const params = new URLSearchParams({"exchange": "binance", "symbol": "BTCUSDT", "timeframe": "1h"});
const res = await fetch(`https://v2.taapi.io/indicator/bbw?${params}`, {
headers: { Authorization: 'Bearer YOUR_API_KEY' },
});
console.log(await res.json());Bollinger Bands Width API response
This response came from the live API on 9 November 2026. Long lists are shortened here.
{
"value": [3.6372],
"upperBand": [76349.5737],
"lowerBand": [73622.1733],
"middleBand": [74985.8735],
"timestamp": [1794218400]
}| Field | Type | Description |
|---|---|---|
value | number[] | Value |
upperBand | number[] | Upper band |
lowerBand | number[] | Lower band |
middleBand | number[] | Middle band |
timestamp | integer[] | Unix time of each candle, in seconds |
Bollinger Bands Width API parameters
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
exchange | string | Yes | — | binance, binancefutures, bybit, gateio, kraken or stocks |
symbol | string | Yes | — | Pair or ticker, e.g. BTCUSDT or AAPL |
timeframe | string | Yes | — | 1m 5m 15m 1h 4h 1d 1w |
period | integer | No | 20 | Period |
multiplier | integer | No | 2 | Multiplier |
results | integer | No | 1 | Number of values to return, or max |
backtrack | integer | No | 0 | Candles to skip from the most recent |
What is Bollinger Bands Width?
Bollinger Bands Width turns the distance between the bands into a single number, which makes volatility squeezes easy to detect in code. The response also includes the three bands themselves.
Bollinger Bands Width formula
| Output | Calculation |
|---|---|
| Width | (upper band − lower band) ÷ middle band × 100 |
How to read Bollinger Bands Width in your code
| Signal | Meaning | Condition |
|---|---|---|
| Squeeze | Volatility is unusually low | value at a multi-candle low |
| Expansion | Volatility is rising | value rising from a low |
| Trend exhaustion | Volatility peaking | value turns down from a high |
Limitations: It gives no direction. A squeeze says a move may come, not which way. Nothing on this page is financial advice.
Compare the last two closed Bollinger Bands Width values
Use backtrack=1 to skip the candle still forming, and results=2 to compare the last two closed candles. Arrays run oldest first.
curl -G https://v2.taapi.io/indicator/bbw \ -H "Authorization: Bearer YOUR_API_KEY" \ --data-urlencode "exchange=binance" \ --data-urlencode "symbol=BTCUSDT" \ --data-urlencode "timeframe=1h" \ --data-urlencode "results=2" \ --data-urlencode "backtrack=1"
import requests
resp = requests.get(
'https://v2.taapi.io/indicator/bbw',
headers={'Authorization': 'Bearer YOUR_API_KEY'},
params={'exchange': 'binance', 'symbol': 'BTCUSDT', 'timeframe': '1h', 'results': 2, 'backtrack': 1},
)
data = resp.json()
prev, last = data['value']
print('value', prev, '->', last)
print('rising' if last > prev else 'falling or flat')Get historical Bollinger Bands Width values
Add results to return a series for backtesting or charting. The last element is the most recent candle.
curl -G https://v2.taapi.io/indicator/bbw \ -H "Authorization: Bearer YOUR_API_KEY" \ --data-urlencode "exchange=binance" \ --data-urlencode "symbol=BTCUSDT" \ --data-urlencode "timeframe=1h" \ --data-urlencode "results=100"
Get Bollinger Bands Width for multiple symbols
Combine Bollinger Bands Width with other indicators in one request. Each exchange, symbol and timeframe combination is one construct: Basic allows 1 per request, Pro 3 and Expert 10.
curl -X POST https://v2.taapi.io/bulk \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"constructs": [
{
"id": "btc_1h",
"exchange": "binance",
"symbol": "BTCUSDT",
"timeframe": "1h",
"indicators": [
{
"id": "bbw",
"indicator": "bbw"
},
{
"id": "rsi",
"indicator": "rsi"
}
]
}
]
}'Stream Bollinger Bands Width in real time
Subscribe over WebSocket to receive new values every 5 seconds while the candle is forming. Streaming supports 1m, 5m, 15m and 1h, and uses interval where REST uses timeframe.
{
"type": "subscribe",
"id": "bbw",
"exchange": "binance",
"symbol": "BTCUSDT",
"interval": "1m",
"indicator": "bbw"
}Bollinger Bands Width API FAQ
What does the Bollinger Bands Width API return?
It returns value, upperBand, lowerBand, middleBand, plus a timestamp for the request. Results are JSON.
Is the latest Bollinger Bands Width value final?
No. The newest value belongs to the candle still forming and can change until it closes. Add backtrack=1 to read the last closed candle.
Which Bollinger Bands Width settings can I change?
You can set period, multiplier. See the parameters table above for defaults.
Can I get Bollinger Bands Width for US stocks?
Yes. Use exchange=stocks with a ticker such as AAPL. US stocks are included on the Pro plan and above.
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