| 摘要 |
Systems, methods, and media for placing orders to trade a security are provided. In some embodiments, for example, methods comprise: receiving an order to trade a security; determining an execution rate for the order, determining a darkness threshold for the order; selecting one or more routes for one or more working orders of the order based on at least the darkness threshold; scoring the one or more routes; allocating size to the one or more working orders based on the scoring and the execution rate; creating the one or more working orders; and sending the one or more working orders to the one or more routes for execution.
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