GET/indicator/kdj

KDJ Indicator

Category: Momentum · Updated November 2026

The TAAPI.IO KDJ API returns k, d, j values for the KDJ Indicator 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/kdj`
Outputs	`valueK`, `valueD`, `valueJ`
Markets	Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks
Timeframes	`1m` to `1w`
Delivery	REST, bulk and WebSocket

Get KDJ with one API call

This request returns KDJ for BTCUSDT on 1-hour Binance candles. Add your API key to run it here.

curl -G https://v2.taapi.io/indicator/kdj \
  -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/kdj',
    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/kdj?${params}`, {
  headers: { Authorization: 'Bearer YOUR_API_KEY' },
});
console.log(await res.json());

KDJ API response

This response came from the live API on 9 November 2026. Long lists are shortened here.

200 OK

{
  "valueK": [32.43446653203624],
  "valueD": [36.85677226447708],
  "valueJ": [23.58985506715456],
  "timestamp": [1794218400]
}

Field	Type	Description
`valueK`	number[]	K
`valueD`	number[]	D
`valueJ`	number[]	J
`timestamp`	integer[]	Unix time of each candle, in seconds

KDJ 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	9	Period
`signal`	integer	No	3	Signal
`results`	integer	No	1	Number of values to return, or `max`
`backtrack`	integer	No	0	Candles to skip from the most recent

What is KDJ?

KDJ extends the stochastic oscillator with a third line, J, that amplifies the difference between K and D. It is widely used on Asian markets and crypto exchanges.

KDJ formula

Output	Calculation
K	Smoothed stochastic %K over the period
D	Smoothed K
J	3 × K − 2 × D

How to read KDJ in your code

Signal	Meaning	Condition
Bullish cross	Momentum turning up	`valueK` crosses above `valueD`
Bearish cross	Momentum turning down	`valueK` crosses below `valueD`
Overbought / oversold	J stretched past its bounds	`valueJ` above 100 or below 0

Limitations: J is intentionally unbounded and overshoots often, so it produces many early warnings. Nothing on this page is financial advice.

Compare the last two closed KDJ 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/kdj \
  -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/kdj',
    headers={'Authorization': 'Bearer YOUR_API_KEY'},
    params={'exchange': 'binance', 'symbol': 'BTCUSDT', 'timeframe': '1h', 'results': 2, 'backtrack': 1},
)
data = resp.json()
prev, last = data['valueK']
print('valueK', prev, '->', last)
print('rising' if last > prev else 'falling or flat')

Get historical KDJ 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/kdj \
  -H "Authorization: Bearer YOUR_API_KEY" \
  --data-urlencode "exchange=binance" \
  --data-urlencode "symbol=BTCUSDT" \
  --data-urlencode "timeframe=1h" \
  --data-urlencode "results=100"

Get KDJ for multiple symbols

Combine KDJ 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.

POST/bulk

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": "kdj",
          "indicator": "kdj"
        },
        {
          "id": "rsi",
          "indicator": "rsi"
        }
      ]
    }
  ]
}'

Stream KDJ 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.

WSSwss://v2.taapi.io/streaming

{
  "type": "subscribe",
  "id": "kdj",
  "exchange": "binance",
  "symbol": "BTCUSDT",
  "interval": "1m",
  "indicator": "kdj"
}

KDJ API FAQ

What does the KDJ API return?

It returns valueK, valueD, valueJ, plus a timestamp for the request. Results are JSON.

Is the latest KDJ 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 KDJ settings can I change?

You can set period, signal. See the parameters table above for defaults.

Can I get KDJ for US stocks?

Yes. Use exchange=stocks with a ticker such as AAPL. US stocks are included on the Pro plan and above.

See the full list of indicators, or start for free.