Standard Deviation
Category: Statistics · Updated November 2026
The TAAPI.IO Standard Deviation API returns real-time and historical values for the Standard Deviation 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/stddev |
| Outputs | value |
| Markets | Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks |
| Timeframes | 1m to 1w |
| Delivery | REST, bulk and WebSocket |
Get Standard Deviation with one API call
This request returns Standard Deviation for BTCUSDT on 1-hour Binance candles. Add your API key to run it here.
curl -G https://v2.taapi.io/indicator/stddev \ -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/stddev',
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/stddev?${params}`, {
headers: { Authorization: 'Bearer YOUR_API_KEY' },
});
console.log(await res.json());Standard Deviation API response
This response came from the live API on 9 November 2026. Long lists are shortened here.
{
"value": [231.19205873904588],
"timestamp": [1794218400]
}| Field | Type | Description |
|---|---|---|
value | number[] | Standard Deviation result |
timestamp | integer[] | Unix time of each candle, in seconds |
Standard Deviation 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 | 5 | Period |
results | integer | No | 1 | Number of values to return, or max |
backtrack | integer | No | 0 | Candles to skip from the most recent |
What is Standard Deviation?
Standard Deviation measures how widely closes are spread around their average. It is the basis of Bollinger Bands and a standard measure of volatility.
Standard Deviation formula
| Output | Calculation |
|---|---|
| Stddev | √(sum of (close − mean)² ÷ n) |
How to read Standard Deviation in your code
| Signal | Meaning | Condition |
|---|---|---|
| Volatility rising | Closes spreading out | value rising |
| Volatility falling | Closes compressing | value falling |
Limitations: Squaring distances makes it sensitive to outliers, and it is in price units. Nothing on this page is financial advice.
Compare the last two closed Standard Deviation 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/stddev \ -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/stddev',
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 Standard Deviation 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/stddev \ -H "Authorization: Bearer YOUR_API_KEY" \ --data-urlencode "exchange=binance" \ --data-urlencode "symbol=BTCUSDT" \ --data-urlencode "timeframe=1h" \ --data-urlencode "results=100"
Get Standard Deviation for multiple symbols
Combine Standard Deviation 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": "stddev",
"indicator": "stddev"
},
{
"id": "rsi",
"indicator": "rsi"
}
]
}
]
}'Stream Standard Deviation 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": "stddev",
"exchange": "binance",
"symbol": "BTCUSDT",
"interval": "1m",
"indicator": "stddev"
}Standard Deviation API FAQ
What does the Standard Deviation API return?
It returns value, plus a timestamp for the request. Results are JSON.
Is the latest Standard Deviation 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 Standard Deviation settings can I change?
You can set period. See the parameters table above for defaults.
Can I get Standard Deviation 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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