I feel like sometimes I put in at a tick, wait a bit, see the bid/ask spread apart with my order in the middle, but it doesn't get filled, and then the bid/ask tightens up again.
Is this due to my data feed not including all exchanges?
In the Front Ed for instance, I wanted to be in the first 300 at an area I thought would get touched, if I wasn't I moved up or down to hopefully assure a fill. Also, the algo skews to benefit those trading size.
I dream of the day when the field is level for the guy trading 1 and the guy trading 100. I know it is never gonna come. But I can dream. What would the world be like, I wonder, if everyone really was on the same field and had to compete on the basis of ability. I suspect it wouldn't be much different. But I'll never get the chance to find out.