Quote from chrisofj:
Thanks Don. I am curious how to account for the premarket trades. GE seemed to have a few trades at 28.15 around 9.11am. GE seems so friendly to me I get suspicious lol. I was thinking I try to err on the side of "by the book" calculations and then as I get a feel for what I can really know from experience, then adjust.
I am looking now at the average range of my opening stocks in their first 3 minutes of the day. The idea is that if in fact I have been filled with the specialist to serve his market needs, I ought to be at one extreme of this average range. Therefore I can expect that I will see some prices and not see others. If I see something unexpected then I have some information to use. Eventually I would like to use this tactic with automated exits over a wider range of stocks.
One thing I have learned in trading is patience.