How does the complex order book work?
Do retail orders get preference or is it supposed to be first in first out?
I had serious issues getting fills with tastyworks on basic call spreads so I started an experiment between tastyworks ib and thinkorswim.
Every day I submit the exact same spread about 15 mins before close. After two weeks of doing this (in either qqq spy or Iwm) the spread got filled 8 times on ib and one time on tos. Not a single fill with tastyworks. I know ib/timber hill…