TradeReplay vs Backtest Now

Turn any trading idea into a tested strategy in seconds. Describe your rules in plain English — AI writes the code, runs the backtest, and shows you real results across stocks, options, and intraday data. Walk-forward testing keeps your strategy honest: train on one period, test on the next, replay trades yourself. No more curve-fitting. Start with a 14-day free trial. By using this app, you agree to our [Privacy Policy](https://www.tradereplay.co/privacy-policy.html) and Apple’s standard End User License Agreement (EULA)(https://www.apple.com/legal/internet-services/itunes/dev/stdeula/).

Analyze your investment approach with Backtest Now, the portfolio analysis app that lets you test investment strategies using decades of historical market data. While internet is required to fetch market data and run new backtests, all calculated results are stored locally on your device - review your portfolio performance anytime, anywhere, even without an internet connection. Key Features: Synthetic Leveraged ETF Backtesting • Backtest leveraged ETFs before they existed! • Analyze portfolio performance during historical crises • SPX 3X/2X/-2X/-3X data since 1928 • NDX 3X/2X/-2X/-3X data since 1985 • DJI 3X/2X/-2X/-3X data since 1992 • Test how 3X ETFs would have performed during Dot-com bubble & 2008 crisis Offline Access to Your Results • View all saved backtest results without internet • Access portfolio performance metrics anytime offline • Your calculated data stays on your device, always available • Internet only needed for running new backtests Backtesting Engine • Test portfolios from 1928 to present with real market data • Compare against S&P 500 (VFINX) benchmark automatically • Support for stocks, ETFs, mutual funds, and synthetic leveraged ETFs Comprehensive Performance Analytics • CAGR (Compound Annual Growth Rate) analysis • Sharpe Ratio for risk-adjusted returns • Annual returns breakdown • All metrics viewable offline once calculated All data is stored locally on your device for offline accessibility. No account required, just powerful investment analysis at your fingertips - online or offline. Start testing your investment strategies today and invest with confidence! Download now and take control of your financial future with data-driven insights.