← Finance & Currency

Fluctuation / Change

GET /fluctuation

Calculate how exchange rates changed between two specific dates, returning the start rate, end rate, absolute change, and percentage change for each currency pair. Useful for financial reports showing currency movement, alerting systems that track FX volatility, and dashboards that display how currencies performed over a given period.

Parameters

start_date required

Start date

end_date required

End date

base optional

Base currency

symbols optional

Target currencies

Example Requests

Basic usage
curl "https://nordapi.ee/api/v1/fluctuation?start_date=2026-03-19&end_date=2026-03-20&base=EUR&symbols=USD,GBP"
EUR vs USD and GBP over one day
curl "https://nordapi.ee/api/v1/fluctuation?start_date=2026-03-19&end_date=2026-03-20&base=EUR&symbols=USD,GBP"
USD vs Nordic currencies over a month
curl "https://nordapi.ee/api/v1/fluctuation?start_date=2026-02-01&end_date=2026-03-01&base=USD&symbols=NOK,SEK,DKK"
All currency changes over a week
curl "https://nordapi.ee/api/v1/fluctuation?start_date=2026-03-17&end_date=2026-03-24&base=EUR"

Live Response 

{
  "base": "EUR",
  "end_date": "2026-03-20",
  "fluctuation": {
    "GBP": {
      "change": 0.0005,
      "change_pct": 0.057878409038292354,
      "end_rate": 0.86438,
      "start_rate": 0.86388
    },
    "USD": {
      "change": 0.0066,
      "change_pct": 0.5744625293759248,
      "end_rate": 1.1555,
      "start_rate": 1.1489
    }
  },
  "start_date": "2026-03-19",
  "success": true
}

Example Response

{"success":true,"fluctuation":{"USD":{"start_rate":1.1489,"end_rate":1.1555,"change":0.0066,"change_pct":0.57}}}
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