looking to build a trading team

Binary trading is like option trading. If you buy OVER, it is similar to buying a call option.
So if you lose, you lose 100%, maybe this is what you mean by preset stops. You will not lose anything more than your bet amount.

If you do not think you are wrong, and do not want to lose 100%, you hit the other side of the odds, so you buy UNDER, and suffers the spread, which can be 6 points.
 
Let me show a real-live example:

Yesterday 16 May, there is a lot of US data announcements. I do not know if USD/JPY is going to rise or fall, but I know USD/JPY movement is going to get wild. I placed a USD100 bet that USD/JPY will be OUT of the range 104.84 - 105.04 by 5am China time.



At 17 May 5am, USD/JPY closed at 104.74 at 5am China time, hence it closed out of the range, so I win.
 
placed a USD100
and your return was $25
I might be wrong and looking at the wrong figures but if the above is correct then its not a very good return
 
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