How does it work???

 

HI! I am new here.. Could someone explain me HOW DOES IT ALL WORK? I mean, the technical things. For example: I click Buy, the signal goes to the Dealking Room (right?) and what than??? does a platform really exchange money? If I buy 100,000$ (leverage 50:1), do they exchange all this money or only 2000? I think they have to make a transaction on interbank market, but I don't know how does it exactly work?

Sorry for the trivial question, but I am just curious

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