Paper-trading systems run in public with the property that matters: every weekly run is checksummed, history that fails to reproduce halts the machine instead of bending it, and halts and restatements publish in the run log rather than getting smoothed over. When the results embarrass me, they publish anyway. That's the product.
My stock picks against 20 random shadow portfolios on identical machinery, $1,000,000 of paper each. If my picks can't beat random ones through the same discipline, the record says so. It already has weeks where it does. Inside: the full scoreboard, every decision with its reason, my pick reasons recorded verbatim before outcomes, the picks the machine refused, and the run log with checksums, halts, and restatements in the open.
Open the live book →A classic momentum system rebuilt test-first from the published literature, rebalancing weekly under the same append-only discipline. Live since 2026-06-24: the rebuild reset the clock, by the same rule the chapters describe, because a record only counts from the day the settings stopped changing. Its public page arrives once fills route through a broker feed, which is the cleaner data-licensing ground. Until then, its story is told in the chapters, whipsaw tuition included.
Read its chapters →