Indicators›Support, resistance & structure›Trendlines

GET/indicator/trendlines

Trendlines

Category: Support, resistance & structure · Updated November 2026

The TAAPI.IO Trendlines API returns line type, start timestamp, end timestamp, start price values for the Trendlines 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/trendlines`
Outputs	`line_type`, `start_timestamp`, `end_timestamp`, `start_price`, `end_price`, `touches` and more
Markets	Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks
Timeframes	`1m` to `1w`
Delivery	REST, bulk and WebSocket

Get Trendlines with one API call

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

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

Trendlines API response

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

200 OK

{
  "line_type": ["support"],
  "start_timestamp": [1790247600],
  "end_timestamp": [1794211200],
  "start_price": [83399.47],
  "end_price": [74572.3044444444],
  "touches": [15],
  "slope": [-8.01740740740745],
  "pattern_index": [5],
  "timestamp": [1794218400]
}

Field	Type	Description
`line_type`	string[]	Line type
`start_timestamp`	number[]	Start timestamp
`end_timestamp`	number[]	End timestamp
`start_price`	number[]	Start price
`end_price`	number[]	End price
`touches`	number[]	Touches
`slope`	number[]	Slope
`pattern_index`	number[]	Pattern index
`timestamp`	integer[]	Unix time of each candle, in seconds

Trendlines 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`
`lookback`	integer	No	5	Lookback
`lookforward`	integer	No	5	Lookforward
`deviationATR`	number	No	1	Deviation atr
`deviationType`	string	No	atr	Deviation type
`source`	string	No	wick	Source
`touches`	integer	No	3	Touches
`max_atr_distance`	number	No	0.5	Max atr distance
`max_lines`	integer	No	5	Max lines
`results`	integer	No	1	Number of values to return, or `max`
`backtrack`	integer	No	0	Candles to skip from the most recent

What is Trendlines?

This endpoint draws diagonal trendlines through price pivots, keeping those that have enough touches. It returns each line's start, end, slope and touch count, so you can automate trendline logic.

Trendlines formula

Output	Calculation
Line	Straight line through pivots, each within `max_atr_distance` ATR of the line

How to read Trendlines in your code

Signal	Meaning	Condition
Type	Support or resistance trendline	`line_type`
Geometry	Where the line runs	`start_price`, `end_price`, `slope`
Quality	Number of touches	`touches`

Limitations: Trendlines are selected from historical pivots and can be redrawn as new ones form. Nothing on this page is financial advice.

Read Trendlines from Python

Use backtrack=1 to read the result as of the last closed candle.

curl -G https://v2.taapi.io/indicator/trendlines \
  -H "Authorization: Bearer YOUR_API_KEY" \
  --data-urlencode "exchange=binance" \
  --data-urlencode "symbol=BTCUSDT" \
  --data-urlencode "timeframe=1h" \
  --data-urlencode "backtrack=1"

import requests

resp = requests.get(
    'https://v2.taapi.io/indicator/trendlines',
    headers={'Authorization': 'Bearer YOUR_API_KEY'},
    params={'exchange': 'binance', 'symbol': 'BTCUSDT', 'timeframe': '1h', 'backtrack': 1},
)
data = resp.json()
print(data['line_type'])

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

Get Trendlines for multiple symbols

Combine Trendlines 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": "trendlines",
          "indicator": "trendlines"
        },
        {
          "id": "rsi",
          "indicator": "rsi"
        }
      ]
    }
  ]
}'

Stream Trendlines 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": "trendlines",
  "exchange": "binance",
  "symbol": "BTCUSDT",
  "interval": "1m",
  "indicator": "trendlines"
}

Trendlines API FAQ

What does the Trendlines API return?

It returns line_type, start_timestamp, end_timestamp, start_price, end_price, touches, slope, pattern_index, plus a timestamp for the request. Results are JSON.

Is the latest Trendlines 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 Trendlines settings can I change?

You can set lookback, lookforward, deviationATR, deviationType, source, touches. See the parameters table above for defaults.

Can I get Trendlines 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.