I'll use Schwab and Fidelity as examples, with RGT as a thinly traded stock. The stock is traded in penny increments. Bid say $14.50...Ask $14.40. So I will go to Fidelity and put my price in the middle to buy...$14.45. I will then check on Schwab (and refresh continually)...The $14.45 will not show up on the ask. Or it will show up twenty minutes later. This happened a few years ago. Does this still happen?? When does it go from the privileged/contracted MM to the general market? Thanks...