An example: I have 1000 dollars, the leverage is 10x, and one stock is 10$. In casual situation I could buy 100 stocks, because I have 1000 dollars, but if I use the leverage I can buy 1000 stocks.
I see the mechanism, how it works, but I don't know how do that +9000 dollars come from. Because in deed I do not have that 9000 dollars, so I will pay 'non-existent' money, but when I sell, I get it back existent money. Furthermore the person/company who sell their stocks will get existent money too.
Where does it come that plus 9000? Or who pays off that plus amount?