BitMEX and CoinEx Closures Expose Critical Gaps in Trading Bot Design

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BitMEX halted all trading on September 23, 2026, while CoinEx announced on September 15 that it will shut down on December 22, marking two major crypto exchange closures within days of each other. Both exchanges reported fully backed reserves and kept withdrawals open, making the wind-downs orderly for human users. However, developers running automated trading bots or treasury scripts face a series of cascading API failures as each closure moves through phases such as reduce-only mode, product halts, deposit freezes, and final account closure. The most costly risk for automated systems is not a failed withdrawal but a script that continues sending funds to deposit addresses that no longer credit them. Developers are advised to implement kill switches for deposits, treat unrecognized API rejection codes as alerts rather than retries, and continuously sweep excess funds to self-custody wallets to reduce exposure to any single venue.

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ProgrammingDEV Community ·

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