This is not Forex trading. You cannot buy or sell Forex with these sites. They use the name Forex specifically in order to deceive people into thinking they are investing in Forex which they are not!
What they do is let you bet whether a currency will go up or down and you supposedly win if the currency moves in the expected direction. The money never leaves the company! Ever! Unlike a risky but real Forex trade that involves buying a currency, hoping it will go up or down and subsequently selling that currency for a profit or loss, nothing is bought or sold here. You are merely betting on the direction the currency will move: up or down. If you are wrong, you "lose" the money and the company keeps it. If you were right, you "win" and are supposed to get the "profit" on your investment.
This is no different than betting hundreds or thousands of dollars on the flip of a coin.
Someone will ask: "so how is this different then a Casino where you can make or lose money?" The difference is twofold. First of all, with a Casino, the risk is clear. Anyone that walks into a Casino knows there is a high chance they will lose their money. With these "companies", they do everything they can to hide the risk and pretend they are an "investment". No one tells their friend or wife "I am investing $1000 in casino gambling" but over here were you are doing the same thing, no one will tell you that your "investment" is pure gambling. Second, in a Casino no one coerces you to come in and gamble away your money and if you lose, they don't pressure you to gamble more money. With these "companies", ounce you put in a small amount of money, they pressure you and hard sell you to add more and more money to your initial "investment" and try to get you to leverage yourself which increases the risk exponentially all while hiding the risks and selling you dreams of huge profits. When you lose money, they try very hard to get you to double down on your investment and "invest" even more money.
I haven't even touched on the fact that with a lot of these "companies" it is impossible to get your money out even if you "win". They are registered in remote countries, have no psychical address or offices and you can never pin them down to get the money. Also, most of these trading platforms are rigged and don't really represent what happens in the real Forex world.