Pearson's Correlation Coefficient
Category: Statistics · Updated November 2026
The TAAPI.IO Correlation API returns real-time and historical values for the Pearson's Correlation Coefficient 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/correl |
| Outputs | value |
| Markets | Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks |
| Timeframes | 1m to 1w |
| Delivery | REST, bulk and WebSocket |
Get Correlation with one API call
This request returns Correlation for BTCUSDT on 1-hour Binance candles. Add your API key to run it here.
curl -G https://v2.taapi.io/indicator/correl \ -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/correl',
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/correl?${params}`, {
headers: { Authorization: 'Bearer YOUR_API_KEY' },
});
console.log(await res.json());Correlation API response
This response came from the live API on 9 November 2026. Long lists are shortened here.
{
"value": [0.8566621973377405],
"timestamp": [1794218400]
}| Field | Type | Description |
|---|---|---|
value | number[] | Correlation result |
timestamp | integer[] | Unix time of each candle, in seconds |
Correlation 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 | 30 | Time 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 Correlation?
Pearson's Correlation Coefficient measures how closely two series move together, from −1 to +1. This endpoint computes it between two inputs of the requested candles.
Correlation formula
| Output | Calculation |
|---|---|
| r | Covariance(A, B) ÷ (stddev A × stddev B) |
How to read Correlation in your code
| Signal | Meaning | Condition |
|---|---|---|
| Strong positive | Series move together | value near 1 |
| No relationship | No linear link | value near 0 |
| Strong negative | Series move oppositely | value near −1 |
Limitations: It only captures linear relationships, and it is computed within one symbol's candles rather than between two symbols. Nothing on this page is financial advice.
Compare the last two closed Correlation 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/correl \ -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/correl',
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 Correlation 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/correl \ -H "Authorization: Bearer YOUR_API_KEY" \ --data-urlencode "exchange=binance" \ --data-urlencode "symbol=BTCUSDT" \ --data-urlencode "timeframe=1h" \ --data-urlencode "results=100"
Get Correlation for multiple symbols
Combine Correlation 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": "correl",
"indicator": "correl"
},
{
"id": "rsi",
"indicator": "rsi"
}
]
}
]
}'Stream Correlation 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": "correl",
"exchange": "binance",
"symbol": "BTCUSDT",
"interval": "1m",
"indicator": "correl"
}Correlation API FAQ
What does the Correlation API return?
It returns value, plus a timestamp for the request. Results are JSON.
Is the latest Correlation 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 Correlation settings can I change?
You can set period. See the parameters table above for defaults.
Can I get Correlation for US stocks?
Yes. Use exchange=stocks with a ticker such as AAPL. US stocks are included on the Pro plan and above.
Related indicators
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