Free Index Historical Data API

Index symbols and timeframes

The index group contains 63 datasets across seven symbols: US500, USTEC, US30, UK100, STOXX50, JP225 and AUS200. Coverage starts in 2019 for most symbols and runs through 2026.

Index datasets support M1, M5, M15, M30, H1, H4, D1, W1 and MN1. Cash indices have exchange sessions, so overnight and weekend gaps are expected.

Index OHLC request

Use the same OHLC endpoint and pass the index symbol. The example below requests USTEC M15. Index prices are CFD values from the source broker, not official exchange settlement prices.

Index data quality

Index feeds can differ from official index values because they are CFD quotes from a broker. Use them for trading-system research, not as a replacement for licensed exchange data. The quality report checks duplicates, OHLC violations, gaps, outliers, flat bars and weekend bars.

Index API use cases

Index API limits

The API is free with 60 requests per minute, 1,000 requests per day, 50,000 rows and 366 days per request. For a multi-year M1 index history, split the request by year.

Request examples

curl "https://www.algospecial.com/api/ohlc.php?symbol=USTEC&tf=M15&from=2026-01-01&to=2026-03-31&format=json"

import pandas as pd
import requests

params = {
    "symbol": "US500",
    "tf": "D1",
    "from": "2024-01-01",
    "to": "2025-12-31",
}
r = requests.get("https://www.algospecial.com/api/ohlc.php", params=params, timeout=30)
r.raise_for_status()
df = pd.DataFrame(r.json()["data"])
df["Timestamp"] = pd.to_datetime(df["Timestamp"])
print(df.head())

All timestamps are broker server time. Some legacy forex exports return 0 for TickVolume and Spread because those fields were not present in the source feed.

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