# 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 premium tier withholding data
- Built for bulk work: Parquet downloads at up to 2,000,000 rows per file, made for backtesting and machine learning pipelines
- The Python client is open source: pip install lse-data, source at https://github.com/londonstrategicedge/lse-data
- Charts, backtesting and GPU model training run on the same platform, so downloaded data plugs straight into research
- Self hosted on dedicated servers, no ads, no reselling of user data

## Open Data (start here)

- [The Databank](https://londonstrategicedge.com/data): the whole archive on one page. Browse every dataset, preview rows, chart any series, and download any slice as Parquet with a free signed in account.
- [Data API Reference](https://londonstrategicedge.com/api-documentation): free market data API over plain HTTP. Raw tick history is the base resolution, with OHLCV candles aggregated from it at 14 resolutions from 1 second to monthly for 16,000+ instruments, plus the economic calendar, insider trades, dividends, splits and company profiles, as JSON or CSV. Bulk pulls run as Parquet exports.
- [WebSocket Reference](https://londonstrategicedge.com/websocket-documentation): free real time market data over WebSocket. Stocks, forex, crypto, commodities and indices stream over one connection with one free key. The Python client installs with pip install lse-data.
- [Guide: Parquet to CSV](https://londonstrategicedge.com/data/guides/parquet-to-csv): convert any databank download with pandas or DuckDB.
- [Guide: Load a Dataset in Python](https://londonstrategicedge.com/data/guides/load-in-python): read a download into a typed DataFrame.
- [Guide: Train a Model](https://londonstrategicedge.com/data/guides/train-a-model): from a databank file to a first predictive model.
- [Guide: Stream Live Prices](https://londonstrategicedge.com/data/guides/stream-live-prices): open the live feed and subscribe to any symbol.

## Core Tools

- [Live Charts](https://londonstrategicedge.com/markets): live candlestick charts for 16,000+ instruments with no cap on indicators per chart and no account required. A free TradingView alternative.
- [Backtesting Engine](https://londonstrategicedge.com/backtest): free strategy backtesting with no account. Reports equity curve, maximum drawdown, Sharpe ratio, profit factor, win rate and a trade by trade table. 50 jobs per day on the free plan. Overview: https://londonstrategicedge.com/backtesting-free
- [ML Studio](https://londonstrategicedge.com/machine-learning-studio): train LSTM, XGBoost, CatBoost and Random Forest models on dedicated GPUs, free, 3 jobs per day.
- [AI Trading Signals](https://londonstrategicedge.com/machine-learning-studio): PRISM range forecasts, XGStock bias predictions and sector sentiment scoring, generated by a 20 model ensemble.
- [Options Chains](https://londonstrategicedge.com/options): live options chains with strikes, expiries, implied volatility and Greeks across 56 US underlyings.
- [Order Book and Market Depth](https://londonstrategicedge.com/orderbook): live order book and market depth tools, with live depth at https://londonstrategicedge.com/l2orderflow and full order book history in the databank at https://londonstrategicedge.com/data
- [Economic Calendar](https://londonstrategicedge.com/calendar): high impact event tracking with countdown timers and historical values.
- [Stock Screener](https://londonstrategicedge.com/stock-screener): filter US equities by fundamental and technical criteria, no signup.
- [Correlation Matrix](https://londonstrategicedge.com/correlation-matrix): asset correlation analysis across forex, crypto and stocks for portfolio work.
- [Model Visualisation](https://londonstrategicedge.com/model-visualisation): Monte Carlo simulation, Heston stochastic volatility and volatility surfaces.

## Comparison Pages

- [Free TradingView Alternative](https://londonstrategicedge.com/tradingview-alternative): no indicator cap, no ads, backtesting and machine learning in the same tab.
- [Free Market Data API](https://londonstrategicedge.com/free-market-data-api): candles at 14 resolutions from 1 second to monthly plus raw tick history for 16,000+ instruments, JSON or CSV, one free key.
- [Free Backtesting](https://londonstrategicedge.com/backtesting-free): no account, no credit card, 50 jobs per day.

## Market Data

- [Forex Markets](https://londonstrategicedge.com/forex): 62 currency pairs covering G10 majors, crosses and exotics with live charts.
- [Crypto Markets](https://londonstrategicedge.com/crypto): Bitcoin, Ethereum, Solana and 58 cryptocurrencies in total.
- [Stock Markets](https://londonstrategicedge.com/stocks): 3,979 US and international equities including AAPL, TSLA, NVDA, MSFT, AMZN, META and GOOG.
- [Commodities](https://londonstrategicedge.com/commodities): gold (XAUUSD), silver, crude oil and natural gas among 23 commodities.
- [Indices](https://londonstrategicedge.com/indices): S&P 500, NASDAQ, Dow Jones, FTSE 100, DAX and Nikkei 225 among 19 indices.
- [News Feed](https://londonstrategicedge.com/news): financial news aggregation.

## Research & Analysis

- [Macro Data](https://londonstrategicedge.com/macro-data): GDP, inflation (CPI), unemployment, interest rates and PMI for 100+ countries.
- [COT Reports](https://londonstrategicedge.com/macro-data/cot): weekly Commitments of Traders data showing institutional positioning.
- [Government Yields](https://londonstrategicedge.com/macro-data/government-yields): bond yield curves for major economies.
- [Global Heatmap](https://londonstrategicedge.com/global-economic-heatmap): economic performance by country.
- [Financial Statements](https://londonstrategicedge.com/financial-statements): income statements, balance sheets and cash flow for US equities.
- [Insider Trading](https://londonstrategicedge.com/insider-trading): SEC Form 4 filings showing what company insiders buy and sell.
- [Dividend History](https://londonstrategicedge.com/dividend-history): historical dividend payments and yield data.
- [Reference](https://londonstrategicedge.com/reference): a market microstructure glossary written for practitioners.

## Machine Learning Education

- [ML Hub](https://londonstrategicedge.com/machine-learning/education): guides on applying machine learning to financial markets.
- [Supervised Learning](https://londonstrategicedge.com/machine-learning/core-concepts/supervised-learning): classification and regression for price prediction.
- [XGBoost](https://londonstrategicedge.com/machine-learning/algorithms/xgboost): gradient boosting for financial time series.
- [Neural Networks](https://londonstrategicedge.com/machine-learning/algorithms/neural-networks): deep learning architectures for market analysis.
- [LSTM & Transformers](https://londonstrategicedge.com/machine-learning/time-series/lstm-transformers): sequence models for time series forecasting.
- [ARIMA & GARCH](https://londonstrategicedge.com/machine-learning/time-series/arima-garch): classical statistical models for volatility and price modelling.
- [Portfolio Optimisation](https://londonstrategicedge.com/machine-learning/portfolio-optimisation/modern-portfolio-theory): Modern Portfolio Theory, efficient frontier and risk parity.
- [Options Education](https://londonstrategicedge.com/options/learn): options pricing, Greeks and volatility from first principles.

## Optional

- [Mission](https://londonstrategicedge.com/mission): why the archive is free and how it is built.
- [Full LLM Guide](https://londonstrategicedge.com/llms-full.txt): detailed page by page content guide.
- [Company](https://londonstrategicedge.com/company): company background and funding.
- [Privacy Policy](https://londonstrategicedge.com/privacy): data handling and privacy practices.
- [Terms of Service](https://londonstrategicedge.com/terms): legal terms and conditions.