Quote from CONR:
What is considered large size on the ES? In other words, what will large traders/institutions buy/sell on a single trade? Given the CME consolidates trades, you can't tell on the T&S.
Thanks in advance.
Quote from speculatus:
1. CME doesn't consolidate trades.
2. Calculate init/main margin for a given size and you'll see how much was put on the trade. Trades well above 100 cars are very common.

Quote from jeb9999:
1. Wrong. The CME has consolidated trades on Globex since 12/18/2005.
Please refer to the CME document at http://www.cme.com/files/M6Aggregation.pdf
Quote from CONR:
Thanks. I thought I read that at one time but It was too late last night to get into a pissing match.
I'm constantly seeing prints of 200, 300, 500, etc. That's why I asked.
Quote from speculatus:
This is aggregation, not consolidation. For an incoming market order you'll see a print that would match the order size, unless you sweep the book. In the sweep case you'll see several prints on each price level.
Throw away your cheap consolidated (read snapshot-based) feed, get a real-time tick-by-tick feed and you'll see the difference.