Technical Indicators API Reference

Fonrex computes 18 indicators with pandas-ta on the prices stored in the database. Ingest a listing before asking for its indicators (GET /eod/{ticker} or POST /historical/ingest). Without prices, GET /technical/{ticker} answers 404; /multi and /chart answer with no bars and the reason in errors.

Category	Indicators (default parameters)
Trend	sma (20), ema (20), wma (20), dema (20), tema (20), vwap (intraday only)
Momentum	rsi (14), macd (12, 26, 9), stoch (14, 3, 3), cci (20), roc (10), mom (10)
Volatility	bbands (20, 2.0), atr (14), kc (20)
Volume	obv, ad, mfi (14)

GET /technical/list returns this catalogue with the parameters, the output columns and the minimum number of bars of each indicator.

Resolutions 1D (default), 1W and 1M read the end-of-day prices of the listing; an intraday resolution such as 1min reads the 1-minute candles saved by the realtime stream (prices_intraday). Results are cached in Redis (1 hour for daily bars, 60 seconds for 1-minute bars) when TECHNICAL_CACHE_ENABLED=true.

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GET /technical/{ticker}

One indicator.

Parameter	Type	Default	Description
indicator	string	rsi	Indicator name
period	integer	—	Sets the length parameter (not used by macd and stoch, which take fast/slow/signal or their defaults)
fast, slow, signal	integer	—	MACD parameters
std	number	—	Bollinger standard deviations
resolution	string	1D	1D, 1W, 1M, or intraday (1min)
from_date, to_date	date	—	Window YYYY-MM-DD
limit	integer	500	Bars loaded (TECHNICAL_DEFAULT_LIMIT)

curl -s -H "X-API-KEY: $FONREX_API_KEY" \
  "http://localhost:5000/technical/AIR.PA?indicator=rsi&period=14&limit=60"

{
  "ticker": "AIR.PA",
  "indicator": "rsi",
  "params": { "length": 14 },
  "resolution": "1D",
  "category": "momentum",
  "from_date": "2026-07-16T00:00:00Z",
  "to_date": "2026-10-07T00:00:00Z",
  "count": 60,
  "series": [
    {
      "name": "RSI_14",
      "label": "RSI",
      "values": [
        { "t": "2026-07-16T00:00:00Z", "v": null },
        { "t": "2026-10-07T00:00:00Z", "v": "74.81" }
      ]
    }
  ],
  "cached": false,
  "calculated_at": "2026-10-08T16:34:58Z"
}

An indicator with several outputs (MACD, Bollinger Bands, Stochastic…) has one entry per output in series. Values are decimal strings, null while the indicator has too few bars.

Code	When
400	Unknown indicator, or VWAP asked on daily bars
404	No prices stored for the ticker
422	Not enough bars for the parameters

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GET /technical/{ticker}/multi

Several indicators computed on one read of the prices.

Parameter	Type	Default	Description
indicators	string	sma_20,ema_50,rsi_14,macd	Comma-separated names; a suffix sets the first parameter (sma_50, bbands_20)
resolution, from_date, to_date, limit			As above
include_ohlcv	boolean	false	Also return the bars

The answer holds one result per indicator in indicators (same format as above) and the failures in errors.

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GET /technical/{ticker}/chart

Bars and indicator columns aligned on the same timestamps, ready for a charting library.

Parameter	Default
indicators	sma_20,ema_50,volume
limit	200

{
  "ticker": "AIR.PA",
  "resolution": "1D",
  "timestamps": ["2026-08-27", "2026-08-28"],
  "ohlcv": { "open": [158.14, 157.45], "high": [160.14, 159.45], "low": [156.14, 155.45], "close": [159.14, 158.45], "volume": [1359000, 1360000] },
  "indicators": { "SMA_20": [null, null], "RSI_14": [null, 0.0] }
}

---

POST /technical/batch

Several tickers at once. JSON body:

{
  "tickers": ["AIR.PA", "BNP.PA", "MC.PA"],
  "indicators": ["rsi_14", "sma_50"],
  "resolution": "1D",
  "from_date": null,
  "to_date": null,
  "limit": 500,
  "include_ohlcv": false
}

At most TECHNICAL_MAX_BATCH_TICKERS tickers (20) and TECHNICAL_MAX_BATCH_INDICATORS indicators (10). The answer maps each ticker to a multi-indicator result. This route only computes: a read-only key may call it.

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GET /technical/screen

Instruments of the catalogue whose last value of an indicator meets a condition.

Parameter	Type	Default	Description
indicator	string	rsi	Indicator
operator	string	lt	lt, gt, lte, gte
value	number	30	Threshold
resolution	string	1D	Resolution
period	integer	14	Indicator length
limit	integer	50	Maximum matches

{
  "indicator": "rsi",
  "params": { "length": 14 },
  "operator": "gt",
  "value": 50.0,
  "resolution": "1D",
  "matches": [ { "ticker": "AIR.PA", "name": "Airbus SE", "isin": "NL0000235190", "value": "74.81" } ],
  "total": 1,
  "calculated_at": "2026-10-08T16:34:59Z"
}

Screener results are cached 15 minutes.