Removes all available unexecuted submitted and forked tasks from scheduling queues and adds them to the given collection, without altering their execution status.

移除任务调度队列中所有未有效提交和已分解的任务，并将它们添加到给定的集合，但不改变其执行状态。

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The math exercise may not account for unexecuted trades, options expiring worthless, monitoring open positions and more.

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Before the new SEC-mandated rules, marketmakers would often let limit orders pile up unexecuted unless the market rose or dropped to a point where they could get their accustomed spread.

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Most times the orders would go unexecuted.

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