user34018: Hi was reading through the wiki about exchanges, 
https://en.bitcoin.it/wiki/Trading_bitcoins
it looks there are two kinds of them, what's the difference?

user31844: The price in real-time trading exchanges is determined dynamically based on supply and demand. People sell and buy which influences/determines the price fluctuations.
The price in fixed rate trading exchanges is whatever the seller chooses to; e.g. selling 1btc for $450 each. That price is usually determined by consulting real-time exchanges and the seller will update the price accordingly.

34018: <p>Hi was reading through the wiki about exchanges, </p>

<p><a href="https://en.bitcoin.it/wiki/Trading_bitcoins" rel="nofollow">https://en.bitcoin.it/wiki/Trading_bitcoins</a></p>

<p>it looks there are two kinds of them, what's the difference?</p>
 31844: <p>The price in real-time trading exchanges is determined dynamically based on supply and demand. People sell and buy which influences/determines the price fluctuations.</p>

<p>The price in fixed rate trading exchanges is whatever the seller chooses to; e.g. selling 1btc for $450 each. That price is usually determined by consulting real-time exchanges and the seller will update the price accordingly.</p>
