113 Backtests From One Desk: Why Nobody Logs How Many Times the Agent Tried

QuanTradin · reddit · 2026-09-19

A backtester developer (MCP server exposing strategy submission to agents, paper-only) argues the most important unlogged number in agent-driven research is N — how many times the agent tried.

Jonathan Kinlay's LLM agent reported an in-sample Sharpe of 2.12 on structureless synthetic data; the inflation traced to uncaptured N and k (signal legs). Without N, best of 5 and best of 500 look identical. An MCP server wins because N is a property of the transport, not self-reported.

His data: 307 runs across 26 desks — median 2, 90th percentile 20, busiest 113, in a bimodal distribution. The unsolved problem: agents can mint a second desk to reset their counter, making the count advisory rather than enforced. He openly admits his engine prints the verdict without "best of 113" and asks where to attach a trial counter that survives client resets.

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