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Compare two backtest runs side by side

FFiveMinFiona· Aug 2026 ago planned· 👍 2· 💬 3
I change one thing, run again, and then compare two summary screens by looking back and forth. It works and it's error-prone. What I want: select two runs, see the differences, same metrics next to each other, and ideally the trades that exist in one and not the other. That last part is the valuable half. Knowing the return changed is much less useful than seeing which four trades caused the change.
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FiveMinFiona
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3 replies

BacktestBetty· Aug 2026 ago
The trade-level diff is the feature. Metric comparison I can do in a spreadsheet; the diff I can't.
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PremarketPete· Aug 2026 ago
And it would enforce the fair-comparison discipline automatically, since you'd see if the periods differ.
TraderWeTraderWe Team· Aug 2026 ago· edited Aug 2026 ago
Noted, and the trade-level diff is the part we'd want to get right too. A metrics table is easy, matching trades across two runs is the actual work (same-day entries with different sizes, partial fills, etc, we'd have to decide what counts as "the same trade"). No timeline to promise. In the meantime the only thing that helps is exporting both trade lists and diffing on entry timestamp + symbol, which is clunky but at least it's mechanical instead of eyeballing.
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