GET/indicator/stochf

Fast Stochastic Oscillator

Category: Momentum · Updated November 2026

The TAAPI.IO Fast Stochastic API returns fast k, fast d values for the Stochastic Fast 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/stochf`
Outputs	`valueFastK`, `valueFastD`
Markets	Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks
Timeframes	`1m` to `1w`
Delivery	REST, bulk and WebSocket

Get Fast Stochastic with one API call

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

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

Fast Stochastic API response

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

200 OK

{
  "valueFastK": [38.95189557229738],
  "valueFastD": [50.17544410072443],
  "timestamp": [1794218400]
}

Field	Type	Description
`valueFastK`	number[]	Fast k
`valueFastD`	number[]	Fast d
`timestamp`	integer[]	Unix time of each candle, in seconds

Fast Stochastic 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`
`kPeriod`	integer	No	5	Fast-K Period
`fastD_Period`	integer	No	3	Fast-D Period
`fastD_MAType`	integer	No	0	Fast-D MA
`results`	integer	No	1	Number of values to return, or `max`
`backtrack`	integer	No	0	Candles to skip from the most recent

What is Fast Stochastic?

The Fast Stochastic is the unsmoothed form: %K comes straight from the range calculation, and %D is its moving average. It reacts sooner than the regular (slow) stochastic and gives more signals.

Fast Stochastic formula

Output	Calculation
Fast %K	(close − lowest low) ÷ (highest high − lowest low) × 100
Fast %D	MA(fast %K, fastD_Period)

How to read Fast Stochastic in your code

Signal	Meaning	Condition
Overbought	Close near top of range	`valueFastK` above 80
Oversold	Close near bottom of range	`valueFastK` below 20
Crossover	Short-term momentum shift	`valueFastK` crosses `valueFastD`

Limitations: Without smoothing it is very noisy, particularly on minute charts. Nothing on this page is financial advice.

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

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

Get Fast Stochastic for multiple symbols

Combine Fast Stochastic 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": "stochf",
          "indicator": "stochf"
        },
        {
          "id": "rsi",
          "indicator": "rsi"
        }
      ]
    }
  ]
}'

Stream Fast Stochastic 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": "stochf",
  "exchange": "binance",
  "symbol": "BTCUSDT",
  "interval": "1m",
  "indicator": "stochf"
}

Fast Stochastic API FAQ

What does the Fast Stochastic API return?

It returns valueFastK, valueFastD, plus a timestamp for the request. Results are JSON.

Is the latest Fast Stochastic 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 Fast Stochastic settings can I change?

You can set kPeriod, fastD_Period, fastD_MAType. See the parameters table above for defaults.

Can I get Fast Stochastic 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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