user70395: I a bit puzzled to see high transaction rates on BTC exchanges yet read that the blockchain only confirms about 6 transactions per second. Given that every transaction on an exchange requires also a transaction on the blockchain, how does it work? Is my perception of the volume just wrong? Or are there quiet times at exchanges when the blockchain can catch up?

user24925: 
Given that every transaction on an exchange requires also a transaction on the blockchain, how does it work? 

They don't, movements on exchanges are internal, not Bitcoin transactions.

70395: <p>I a bit puzzled to see high transaction rates on BTC exchanges yet read that the blockchain only confirms about 6 transactions per second. Given that every transaction on an exchange requires also a transaction on the blockchain, how does it work? Is my perception of the volume just wrong? Or are there quiet times at exchanges when the blockchain can catch up?</p>
 24925: <blockquote>
  <p>Given that every transaction on an exchange requires also a transaction on the blockchain, how does it work? </p>
</blockquote>

<p>They don't, movements on exchanges are internal, not Bitcoin transactions.</p>
