I am oversimplifying. You are right that speed still matters for cancels. It's true that you can post hidden midpoint orders. That's a far cry from posting a p

I am oversimplifying. You are right that speed still matters for cancels. It's true that you can post hidden midpoint orders. That's a far cry from posting a public bid at $42.2837 in order to jump the queue ahead of someone posting $42.2836.