Vynn Backtester

Backtest any trading strategy with natural language. Get Sharpe ratio, returns, drawdown, and full equity curves in seconds.

What it does

• Natural language strategies: Describe your strategy in plain English and Vynn translates it into a runnable backtest
• Structured strategies: Power users can pass precise entry/exit rules as JSON
• Full metrics: Sharpe ratio, total return, max drawdown, win rate, trade count, and equity curve
• Multi-ticker: Backtest across any combination of stocks, ETFs, or indices
• Strategy comparison: Compare multiple strategies head-to-head, ranked by Sharpe ratio
• No infrastructure: No local data downloads, no dependencies beyond Python stdlib

Setup

1. Get a free API key at the-vynn.com (10 backtests/month, no credit card)
2. Set VYNN_API_KEY in your environment or skill config
3. Run /backtest "your strategy here" from any OpenClaw agent