CoinPrize binary option only utilize the close price of trading days, and you are investing with other player that choose the opposite prediction as you, the platform gives both sides one day to accumulate more players get involved, and winners gets all bitcoins from the failed opposite players.
Here’s how it works: For each round, given the last close price available at the moment you played, you predict increase or decrease on the close price of the given forecasting date. If the close price of forecasting date is higher or lower than the last close price just like what you predicted, you win.