Three Line Strike Candlestick Pattern
Category: Candlestick patterns · Updated November 2026
The TAAPI.IO Three Line Strike API returns whether the pattern appeared on each candle for the Three Line Strike candlestick pattern 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/3linestrike |
| Outputs | value |
| Markets | Binance, Binance Futures, Bybit, Gate.io, Kraken and US stocks |
| Timeframes | 1m to 1w |
| Delivery | REST, bulk and WebSocket |
Get Three Line Strike with one API call
This request returns Three Line Strike for BTCUSDT on 1-hour Binance candles. Add your API key to run it here.
curl -G https://v2.taapi.io/indicator/3linestrike \ -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/3linestrike',
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/3linestrike?${params}`, {
headers: { Authorization: 'Bearer YOUR_API_KEY' },
});
console.log(await res.json());Three Line Strike API response
This response came from the live API on 9 November 2026. Long lists are shortened here.
{
"value": [0],
"timestamp": [1794218400]
}| Field | Type | Description |
|---|---|---|
value | number[] | Three Line Strike result |
timestamp | integer[] | Unix time of each candle, in seconds |
Three Line Strike 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 Three Line Strike?
Three Line Strike is a 4-candle Japanese candlestick pattern. Three candles in one direction are followed by a fourth candle that opens beyond the third and closes beyond the first. The fourth candle erases three candles of progress, and traders disagree on whether that signals reversal or continuation, so test it.
How to read Three Line Strike in your code
| Signal | Meaning | Condition |
|---|---|---|
| Bullish | Bullish variant completed on this candle | value > 0 |
| Bearish | Bearish variant completed on this candle | value < 0 |
| Not detected | No pattern on this candle | value equals 0 |
Limitations: Candlestick patterns describe what already happened and are more meaningful alongside trend and volume. On 24/7 crypto markets there are few real gaps between candles, so gap-based patterns occur less often than on stocks. Nothing on this page is financial advice.
Detect Three Line Strike with Python
Check the last closed candle by adding backtrack=1. A pattern on the candle still forming can disappear before it closes.
curl -G https://v2.taapi.io/indicator/3linestrike \ -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/3linestrike',
headers={'Authorization': 'Bearer YOUR_API_KEY'},
params={'exchange': 'binance', 'symbol': 'BTCUSDT', 'timeframe': '1h', 'results': 2, 'backtrack': 1},
)
data = resp.json()
signal = data['value'][-1]
if signal > 0:
print('Bullish pattern on the last closed candle')
elif signal < 0:
print('Bearish pattern on the last closed candle')
else:
print('No pattern')Get historical Three Line Strike 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/3linestrike \ -H "Authorization: Bearer YOUR_API_KEY" \ --data-urlencode "exchange=binance" \ --data-urlencode "symbol=BTCUSDT" \ --data-urlencode "timeframe=1h" \ --data-urlencode "results=100"
Get Three Line Strike for multiple symbols
Combine Three Line Strike 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.
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": "3linestrike",
"indicator": "3linestrike"
},
{
"id": "rsi",
"indicator": "rsi"
}
]
}
]
}'Stream Three Line Strike 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.
{
"type": "subscribe",
"id": "3linestrike",
"exchange": "binance",
"symbol": "BTCUSDT",
"interval": "1m",
"indicator": "3linestrike"
}Three Line Strike API FAQ
What does the Three Line Strike API return?
It returns value, plus a timestamp for the request. Results are JSON.
What do the Three Line Strike values mean?
0 means no pattern. A non-zero value means it was detected and is positive when bullish and negative when bearish. TA-Lib patterns commonly return 100 or −100, and some return other values such as 80 or −80, so check the sign and not an exact number.
Can I get Three Line Strike 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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