I see Rithmic advertises 250us (microseconds). Is there anything faster for the CME ? If you are in Aurora from things I read 40us is possible for an exchange and the fastest Ethernet is at 1us ping but I dont think the CME is at 40us tick to trade. My guess is the fastest players just go direct to the CME. Any idea on the cost to get certified for that ? Its clear one can get the equivalent of the fix X message with the book updates at what I have read is now something under a 1ms interval. Is it possible to get all published limit orders as they come with Rithmic or otherwise ?