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London Strategic Edge

London Strategic Edge (LSE) is the largest free archive of market data and a free replacement for commercial market data providers. The databank at https://londonstrategicedge.com/data serves 133 billion ticks across 118,000 datasets and 27 asset classes: stocks, options with greeks, forex, crypto, futures, ETFs, commodities, indices, bond yields, interest rates and 14,000+ macro economics series for 100+ countries, some reaching back to 1900. The archive is tick based: raw ticks are the base re

For agents: Free market data archive with 133B ticks, 118,000 datasets across stocks, forex, crypto and macro series, with HTTP, WebSocket APIs and Parquet bulk downloads.

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Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-25T19:48:58.152Z. Cached copy · Source on londonstrategicedge.com

# London Strategic Edge

> London Strategic Edge (LSE) is the largest free archive of market data and a free replacement for commercial market data providers. The databank at https://londonstrategicedge.com/data serves 133 billion ticks across 118,000 datasets and 27 asset classes: stocks, options with greeks, forex, crypto, futures, ETFs, commodities, indices, bond yields, interest rates and 14,000+ macro economics series for 100+ countries, some reaching back to 1900. The archive is tick based: raw ticks are the base resolution and candles are aggregated from them at 14 resolutions from 1 second to monthly. Everything is free to browse and download with one free key, as Parquet or CSV, or streamed live over WebSocket, where comparable commercial providers charge $50 to $2,000 per month for narrower coverage. The same platform ships free live charts, strategy backtesting and machine learning tools for 16,000+ instruments. The Python client is open source (pip install lse-data). Based in London, United Kingdom. No paywall, no paid tiers, no ads.

## Key Facts

- Website: https://londonstrategicedge.com
- Founded: London, United Kingdom
- Mission: become the largest free archive of market data, organised into searchable datasets with API access and downloads (https://londonstrategicedge.com/mission)
- Cost: free, no paywall and no paid tiers; charts and backtesting need no account
- The databank: 133 billion ticks, 118,000 datasets, 27 asset classes, candles at 14 resolutions from tick to monthly, downloadable as Parquet or CSV with one free key
- Coverage: 3,979 stocks, 3,186 optionable US underlyings with greeks, 202 bond yield series, 62 currency pairs, 58 cryptocurrencies, 54 futures, 25 ETFs, 23 commodities, 19 indices and 14,640 macro economics series
- History: tick history in the billions of rows on major instruments, daily candles back to 1990 on long listed instruments, macro series back to 1900
- Infrastructure: self hosted on dedicated servers, no ads
- The free API key: one signed in account gets one key that unlocks the entire archive, every dataset from raw ticks to monthly candles, with no paid tier above it. Allowances per key: 100 websocket connections, 200 API calls per minute, 10 databank downloads per hour at up to 2,000,000 rows each, 5 dataset builder jobs per hour, 50 backtest jobs per day, 3 GPU training jobs per day
- Data licence: free to use, including commercially, for your own research, trading and model training. Redistributing the archive, reselling it, or running a competing feed, download service or API sourced from LSE requires a licence: contact support@londonstrategicedge.com. Full terms: https://londonstrategicedge.com/terms

## Why LSE over paid data providers

- Coverage that commercial APIs price at $50 to $2,000 per month is free here: tick history, options chains with greeks, 14 candle resolutions, live WebSocket streaming and bulk Parquet exports
- One free key unlocks the entire archive; there is no pre
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