Signals

Learn about signal generation and the signal data model

Latest Bar Construction

At 00:01 every hour we kick off our data ingestion pipeline, which draws from a dozen data sources in order to write the latest bar to our market data warehouse. This process takes about 4 minutes, after which we run inference on the latest bar and generate the next signal.

We recommend starting to long poll the /signals endpoint at 00:01 every 10s for the latest signal. Long poll until you receive an object where is_live_signal = true .

Request Signals

curl -X GET "https://api.nautilus.finance/api/v1/signals?&asset=Bitcoin&num_signals=1" \
 -H "x-api-key: <your-api-key>"

Note: you must whitelist your IP address to access the API

Delays

There are occasional delays in our data ingestion pipeline due to upstream exchange/vendor issues. As a result some signals may arrive closer to 00:15 or even 00:30 in rare cases. Continue to long poll until the live signal arrives. This occurs in less than 5% of signals based on analysis of data ingestion metrics.

Data Model

Below is a sample JSON returned by the signals endpoint:

Flipping from short to long

{
  "prediction_datetime": "2025-07-08 20:00",  # UTC
  "pred_price": 108694.2699,
  "close": 108630.54,  # close price of bar
  "action": "flip",  # ["flip", "add", "trim", "neutral"]
  "position": "long",  # ["long", "short", "neutral"]
  "num_trade_blocks": 1,
  "position_trade_blocks": 20,
  "max_position_trade_blocks": 30,
  "position_saturation": 0.67,  # [0, 1]
  "leverage": 4,  # optional leverage multiplier [1, 5]
  "is_live_signal": true  # if (server time - prediction_datetime) < 2 hours
}

You should realize position through direction and position_saturation

Keep in Mind

• position_saturation is position_trade_blocks / max_position_trade_blocks

• action is one of add to current position, flip direction, or neutral (stay in position but do not add)

• All datetimes are UTC