Don how long have you been trading. The reason why I ask is that I believe you have been trading for quite a while and I am a bit surprise that your entries are at low share volumes. I would expect that a person at your experience level would be entering positions of minimum of 10,000 plus per trade.
Shortee,
I don't pretend to answer for Don. There are [at least] two reasons why one would not trade 10000 shares regardless of experience:
1) The strategy doesn't warrant it. In doing OO orders, you are easily puting in two dozen orders, and in the case of some traders, many more than that. So instead of making one big trade, you make many smaller ones. In fact, the more you get filled, the better it can be, as from a purely statistical basis, you have a greater chance that more of them will be profitable.
2) While it is a necessary condition to have experience to do large size, it is hardly sufficient. There are two reasons for this:
a) You are not psychologically suited to doing such large size.
b) You are risking too much of your stake in one trade
nitro

