Backtesting Python Packages

vectorbt

The backtesting engine that gives you an unfair advantage. Run thousands of trading ideas before others finish one.

backtesting

🔎 📈 🐍 💰 Backtest trading strategies in Python.

backtrader

Python Backtesting library for trading strategies

pkscreener

A Python-based stock screener for NSE, India. PKScreener is an advanced free stock screener to find potential breakout stocks from NSE and show its possible breakout values. It also helps to find the stocks which are consolidating and may breakout, or the particular chart patterns that you're looking specifically to make your decisions.

optopsy

A nimble options research and backtesting library for Python

qubx

Framework for quantitative strategies development, backtesting and live execution.

varrd

AI-powered trading research platform. Test any idea on stocks, futures, and crypto with event studies, backtesting, and statistical validation. MCP server with 8 tools. pip install varrd.

monte-neo

Independent verifier for trading strategies written by AI agents and humans: catches look-ahead bias, hidden costs and overfitting. MCP server, CLI, GitHub Action, signed certificates.

pynesys-pynecore

Pine Script-compatible Python runtime for indicators and strategies, validated against TradingView on real published scripts

aria-code

Terminal-first AI financial agent — runs fully offline via Ollama, 19+ cloud LLM providers, live market data, and a built-in quant research engine.

lumibot

AI agents that actually place the trade. 12 brokers, real backtests, stocks options futures forex crypto and prediction markets.

yfinance-ta-patterns

Institutional-grade Candlestick & Chart Pattern Scanner with AI Confluence Scoring, Backtesting, Native MCP Server, No-GIL (3.13t-3.16t) & PyPy (3.8-3.12)

qis

Performance analytics, portfolio backtesting, risk analysis, and factsheet reporting in Python

ml4t-specs

Serializable, runtime-neutral contracts for market data, artifacts, strategy lifecycles, and execution across ML4T libraries.

openscript

An open trading language. Write a study or a strategy once, plot it, backtest it, trade it.

wickra

Streaming-first technical indicators with a Rust core: native Python, Node.js and WebAssembly bindings plus a C ABI hub for C, C++, C#, Go, Java and R. 514 indicators, O(1) per-tick updates, no system dependencies. Drop-in TA-Lib replacement.

hftbacktest

Free, open source, a high frequency trading and market making backtesting and trading bot, which accounts for limit orders, queue positions, and latencies, utilizing full tick data for trades and order books(Level-2 and Level-3), with real-world crypto trading examples for Binance and Bybit

fugazi

Fast incremental technical analysis indicators and backtesting for Rust and Python — O(1) streaming updates, no TA-Lib C build, Python bindings, a YAML strategy language, and a CLI.

ml4t-backtest

Event-driven backtesting for quantitative strategies with configurable execution, accounting, risk, and framework-parity validation.

zvt

modular quant framework.

tradefloor

A simulated stock market for testing trading strategies and AI agents. Orders move prices, any market can be forked, and every run reproduces exactly.

wickra-gym

A Gymnasium-compatible, microstructure-aware backtest environment with O(1) steps: precompute the dataset to a fixed feature tensor once, then step() is a pure array index. Deterministic RL rollouts, recomputable byte-for-byte in ten languages.

wickra-impact

The backtester that knows you would have moved the market: agent-based fills on the real historical L2 order book.

wickra-backtest

Streaming-native backtester for the Wickra indicator library — backtest == live, in 10 languages (WIP).