Indicators›Trend›Relative Vigor Index

GET/indicator/rvgi

Relative Vigor Index

Category: Trend · Updated November 2026

The TAAPI.IO Relative Vigor Index API returns value, signal, trend values for the Relative Vigor Index 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/rvgi`
Outputs	`value`, `signal`, `trend`
Markets	Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks
Timeframes	`1m` to `1w`
Delivery	REST, bulk and WebSocket

Get Relative Vigor Index with one API call

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

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

Relative Vigor Index API response

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

200 OK

{
  "value": [-0.0612],
  "signal": [-0.0904],
  "trend": ["bullish"],
  "timestamp": [1794218400]
}

Field	Type	Description
`value`	number[]	Value
`signal`	number[]	Signal
`trend`	string[]	Trend
`timestamp`	integer[]	Unix time of each candle, in seconds

Relative Vigor Index 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`
`length`	integer	No	10	Length
`results`	integer	No	1	Number of values to return, or `max`
`backtrack`	integer	No	0	Candles to skip from the most recent

What is Relative Vigor Index?

The Relative Vigor Index, from John Ehlers, is based on the idea that prices tend to close above their opens in uptrends and below in downtrends. The response includes the RVI, its signal line and a trend field.

Relative Vigor Index formula

Output	Calculation
RVI	Weighted average of (close − open) ÷ weighted average of (high − low) over length
Signal	4-candle weighted average of RVI

How to read Relative Vigor Index in your code

Signal	Meaning	Condition
Bullish cross	Vigor turning up	`value` crosses above `signal`
Bearish cross	Vigor turning down	`value` crosses below `signal`
State	Current direction	`trend`

Limitations: Crossovers are frequent in sideways markets, and gaps between candles are ignored. Nothing on this page is financial advice.

Compare the last two closed Relative Vigor Index 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/rvgi \
  -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/rvgi',
    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 Relative Vigor Index 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/rvgi \
  -H "Authorization: Bearer YOUR_API_KEY" \
  --data-urlencode "exchange=binance" \
  --data-urlencode "symbol=BTCUSDT" \
  --data-urlencode "timeframe=1h" \
  --data-urlencode "results=100"

Get Relative Vigor Index for multiple symbols

Combine Relative Vigor Index 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": "rvgi",
          "indicator": "rvgi"
        },
        {
          "id": "rsi",
          "indicator": "rsi"
        }
      ]
    }
  ]
}'

Stream Relative Vigor Index 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": "rvgi",
  "exchange": "binance",
  "symbol": "BTCUSDT",
  "interval": "1m",
  "indicator": "rvgi"
}

Relative Vigor Index API FAQ

What does the Relative Vigor Index API return?

It returns value, signal, trend, plus a timestamp for the request. Results are JSON.

Is the latest Relative Vigor Index 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 Relative Vigor Index settings can I change?

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

Can I get Relative Vigor Index 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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