Quote from bone:
Take another bong hit. Seriously. CL alone traded 1.437M contracts today on Globex.
Quote from Feeman:
I'm speaking of FX futures such as those traded on CME; ditto for the other instruments. There is little liquidity in YM, CL, SI, ZW and many others.
The OP is talking about FUTURES as far as I can tell.
Quote from Feeman:
Try buying 2500 and tell us what happened to price.
Quote from Feeman:
Another argumentative know-it-all who's shopping for customers on ET.
And what size have you seen on Bid/Ask in CL? The market is thin compared to ES and ZN, total contracts notwithstanding.
Try buying 2500 and tell us what happened to price.
Quote from Swan Noir:
Is it accurate to say there is little liquidity in CL? While I don't trade it I have the impression that it is fairly liquid. During RTH and barring news would anyone expect more than two ticks of slippage trading 20 contracts?
Quote from Maverick74:
Damn you are clueless. If you put 2500 contracts on the bid, it would be hit in one second. Gone. Just like that. If you went to the market, you would get slipped for probably 5 ticks. You do realize that the bulk of crude trading is done on the strips right and not just the front month? And you do realize there are both exchange traded spreads that are several thousand up on both sides of the market. Not to mention the implied spreads.

Quote from bone:
I have personally done blocks of 5,000 within 5 cents through ICAP and TFS, clearing ICE Swaps or Clearport. I used to trade energy commercially. That's what those facilities are there for.
And I have also traded ICE Swaps and Clearport through Chicago Prop Futures Groups. I have also traded PJM-W Swaps and HHNG Swaps at Chicago Prop Firms.
I would be happy to arrange an independently verifiable wager if you doubt it.