I guess I was thinking more along the lines of OPRA rules and regulations and exhange rules and regulations which govern equity options trading.
I found the following which is helpful, but would like other suggestions if anyone knows...
Is there a minimum number of contracts per order that is required in order to be posted on the NBBO and hit if a bid or ask higher or lower is hit? It seems like under 5 contracts sometimes doesn't show up on the NBBO and can remain unfilled while slightly higher asks or lower bids are hit.
Thanks.
Can you get IB's option chains on weekends even though the exchanges are closed? I'm not getting any, but I seem to remember getting Friday's closing prices throughout the weekend.