Who trades on each brokers system?

slamdunka

Recruit
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Say I am trading at IG Markets via Puredeal. I am buying and selling but who else is buying and selling. Only IG Markets clients? IG's own traders?

Where is their info(buy/sell prices) coming from? As I understand it its a decentralized market and there is no central exchange so what are these prices they are quoting for say AUD/USD contracts?
 
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