Fully automated trading system required human intervention three times in a month

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A developer building a fully automated stock trading system documented three separate incidents within a month where human intervention was required to correct failures the system could not handle on its own. In the first case, a sell order for a specific stock was repeatedly blocked because the order size always exceeded the remaining daily trading quota, making execution structurally impossible regardless of scheduling. The second incident involved a safety circuit incorrectly blocking two valid buy orders after misreading intraday price snapshots as cumulative loss indicators, triggering a halt that was not warranted. A third failure occurred during the manual fix for the second incident, when a tool used to log human trades silently misclassified a first-time purchase of a new stock as an unrelated transaction, briefly leaving a real asset unrecorded in the ledger. The developer concluded that true automation requires well-designed human intervention pathways that are fully logged and cover all edge cases, since gaps in automation only become visible after failures occur.

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