Decent Broker For Sending Lotsa Quote

(apologies if I have cross posted.)

Looking for recs on what broker to use if I want:

- To post liquidity across 300+ names

- C, C++, Java or UDP (socket level) API

- Historical CQS/CTS, etc.

- Portfolio margin

Thanks!
 
Quote from Zipf:



Looking for recs on what broker to use if I want:

- To post liquidity across 300+ names

- C, C++, Java or UDP (socket level) API


sending orders using UDP? Whatcha talkin bout Zipf?
 
Quote from rosy2:

sending orders using UDP? Whatcha talkin bout Zipf?

Traditionally MD feeds... but my point is that I don't mind whatever low-lat interface the broker exposes.
 
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