GET/indicator/log10

Log Base 10

Category: Math · Updated November 2026

The TAAPI.IO Log Base 10 API returns real-time and historical values for the Log Base 10 math function 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/log10`
Outputs	`value`
Markets	Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks
Timeframes	`1m` to `1w`
Delivery	REST, bulk and WebSocket

Get Log Base 10 with one API call

This request returns Log Base 10 for BTCUSDT on 1-hour Binance candles. Add your API key to run it here.

curl -G https://v2.taapi.io/indicator/log10 \
  -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/log10',
    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/log10?${params}`, {
  headers: { Authorization: 'Bearer YOUR_API_KEY' },
});
console.log(await res.json());

Log Base 10 API response

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

200 OK

{
  "value": [4.869856478128001],
  "timestamp": [1794218400]
}

Field	Type	Description
`value`	number[]	Log Base 10 result
`timestamp`	integer[]	Unix time of each candle, in seconds

Log Base 10 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`
`results`	integer	No	1	Number of values to return, or `max`
`backtrack`	integer	No	0	Candles to skip from the most recent

What is Log Base 10?

Log Base 10 is a math function that takes the base 10 logarithm. On TAAPI.IO it runs on the candles you request, so you can get the result without doing the calculation on your side.

Log Base 10 formula

Output	Calculation
Output	log₁₀(x)

How to read Log Base 10 in your code

Signal	Meaning	Condition
Result	Function output for the candle	`value`

Limitations: It is useful for scaling. Each whole step is a tenfold change in the input. Nothing on this page is financial advice.

Compare the last two closed Log Base 10 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/log10 \
  -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/log10',
    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 Log Base 10 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/log10 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  --data-urlencode "exchange=binance" \
  --data-urlencode "symbol=BTCUSDT" \
  --data-urlencode "timeframe=1h" \
  --data-urlencode "results=100"

Get Log Base 10 for multiple symbols

Combine Log Base 10 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": "log10",
          "indicator": "log10"
        },
        {
          "id": "rsi",
          "indicator": "rsi"
        }
      ]
    }
  ]
}'

Stream Log Base 10 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": "log10",
  "exchange": "binance",
  "symbol": "BTCUSDT",
  "interval": "1m",
  "indicator": "log10"
}

Log Base 10 API FAQ

What does the Log Base 10 API return?

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

Is the latest Log Base 10 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.

Can I get Log Base 10 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.