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Binance and Deribit revoked SignalPlus-linked API credentials as a precaution; there is no cited finding that either exchange was itself breached or every affected trade was cancelled.
The largest reduction saves $3,000 per $100 million of executed notional. Qualification depends on rolling derivatives volume, while funding and managed-account costs remain separate from the exchange tariff.
The completed 1 October move settled and recreated positions while cancelling open perpetual orders. A reliable reconciliation follows realised P&L, funding, balances, new position entries and the instructions entered afterwards.