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A research terminal for long-term investors. Run any portfolio across 50 years of price data, simulate trades with virtual cash, and see exactly what every decision cost you.
Free · No card · Hypothetical results
Mix US stocks, ETFs, and crypto. Lump sum or DCA. Rebalance on any schedule. Compare against SPY out of the box.
Import positions from your broker via CSV. Simulate buys and sells with virtual cash. Track performance vs SPY.
Save a backtest, get a public link with a custom preview card. Anonymous saves allowed — sign up only when you want history.
DiamondHands is a research and education tool. We don't recommend investments — we just give you the historical evidence so you can explore portfolios for yourself.
All results are hypothetical and based on adjusted-close prices. Past performance does not guarantee future results.
Read the full disclaimer →