I will be moving over to a different broker shortly, and I will have the ability to directly route my orders. If I want to set up pre-defined hot keys for trade orders, then how should I choose which route will be best most of the time for my specific stock or ETF? Let us say my scenario is a simple market order of 1,000 shares of QQQ. Is there one route that will be better than another for a specific stock/etf? Or is it always determined only in Level II data in that split second by looking at the various offers? Is it best to just leave a hot key routed with the proprietary algorithm of the broker?? Thank you for any help.