In fact, a binary option has two elements traders need to decide upon: the striking price and the expiration date. Based on the outcome, it is said that the option expires in the money or out of the money.
Moreover, with a sound money management plan and avoiding short-term expiration date, trading binary options is a nice way to diversify a portfolio.
The holy grail in trading is price and time, and binary options include them both. Because of this, it is very difficult to read a positive review even for good brokers.