Hello all,
I have a few questions in mind for some days.
We deposit money to brokers for trading. Thus far I know that brokers earn from the 'Spreads' out of our trades we open.
But I wonder just how much money they make from this spread to conduct a broker? Is it sufficient for them or there are other resources?

My another question is if we lose money then where it belongs? I mean who receives it? And should we make Profit then whose money we're getting? Like I know that Forex is a market place, it's not a commodity. So it's does not have own income source, it's all traders money.
Once I read somewhere that at first Brokers handle their traders by their own money and if it exceeds limit they then switches trades in open market. Might it be true or potential?

Frequently I hear whether a trader get rid of money then the individual broker gets profited. How?