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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
Basic or advanced. Single asset or multi-asset portfolio. Lump sum or DCA. Compare against SPY.
Project forward outcomes by sampling historical returns. See the full distribution: 5th to 95th percentile.
Import positions from your broker via CSV. Simulate buys and sells with virtual cash. Track vs SPY.
Save any backtest, get a public link with a custom preview card. Anonymous saves allowed.
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 →