All recommended binary options brokers
These two indications are meant to answer the question, Will the current price rise or fall from this moment until my option expires, or closes. If you purchase a higher option in binary trading and the rate rises, then you will receive a return. Had you chosen lower, then your trade would not yield any returns and you would lose your stakes invested in that binary trade or binary bet.
They are popular because they allow you to know how much you stand to win and how much you may lose. Many people prefer this type of trading to other forms of betting or speculating on the markets, which can be more difficult and more complicated.