GET/indicator/fisher

Fisher Transform

Category: Momentum · Updated November 2026

The TAAPI.IO Fisher Transform API returns fisher, fisher signal values for the Fisher Transform 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/fisher`
Outputs	`fisher`, `fisher_signal`
Markets	Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks
Timeframes	`1m` to `1w`
Delivery	REST, bulk and WebSocket

Get Fisher Transform with one API call

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

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

Fisher Transform API response

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

200 OK

{
  "fisher": [-1.8701217622321544],
  "fisher_signal": [-1.8401909601063886],
  "timestamp": [1794218400]
}

Field	Type	Description
`fisher`	number[]	Fisher
`fisher_signal`	number[]	Fisher signal
`timestamp`	integer[]	Unix time of each candle, in seconds

Fisher Transform 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`	number	No	—	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 Fisher Transform?

The Fisher Transform, from John Ehlers, converts prices into a distribution closer to normal, which makes turning points sharper. The API returns the Fisher line and a signal line, which is the Fisher line delayed by one candle.

Fisher Transform formula

Output	Calculation
Normalised price	Median price scaled to between −1 and 1 over the period, then smoothed
Fisher	0.5 × ln((1 + x) ÷ (1 − x)), smoothed

How to read Fisher Transform in your code

Signal	Meaning	Condition
Bullish turn	Fisher turned up	`fisher` crosses above `fisher_signal`
Bearish turn	Fisher turned down	`fisher` crosses below `fisher_signal`
Extreme	Stretched reading	Large absolute `fisher` value

Limitations: Sharp turns also mean frequent false signals, especially on short timeframes. Nothing on this page is financial advice.

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

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

Get Fisher Transform for multiple symbols

Combine Fisher Transform 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": "fisher",
          "indicator": "fisher"
        },
        {
          "id": "rsi",
          "indicator": "rsi"
        }
      ]
    }
  ]
}'

Stream Fisher Transform 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": "fisher",
  "exchange": "binance",
  "symbol": "BTCUSDT",
  "interval": "1m",
  "indicator": "fisher"
}

Fisher Transform API FAQ

What does the Fisher Transform API return?

It returns fisher, fisher_signal, plus a timestamp for the request. Results are JSON.

Is the latest Fisher Transform 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 Fisher Transform settings can I change?

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

Can I get Fisher Transform 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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