Algo Trading Dev Log: GPU Swaps, Hidden Bugs, and Two Manual Trade Interventions

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A developer running an algorithmic trading system documented an eventful week between August 17 and 22, during which a newly installed GPU was evaluated, reconsidered, and ultimately returned after two verdict reversals in a single day. Two internally built verification tools were found to be silently missing errors: a groundedness checker was misjudging value formatting, and a numeric checker revealed that formatting errors had appeared in every daily report for at least 45 days undetected. A GPU occupancy monitor also failed two nights in a row due to a flawed availability check, prompting a redesign of how the job hands off resources. The week's safety-layer review exposed a budget-allocation flaw that had been quietly blocking small sell orders for days, requiring one manual trade on a live brokerage account to resolve. A second live intervention followed on Friday when a drawdown safety guard triggered an opposing failure, underscoring recurring gaps between system uptime and actual correctness.

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