In a Boundary or Range Binary Option trade a trader decides whether an asset will trade inside or outside of a price range or within a given time period.
The OptionFair Screen shot above is an example of a Boudary/Range trade. Upper level of 1.56973 and lower level of 1.56795 represent the range or boundaries of the trade. Trader can choose to trade inside of the range or outside of the range. In this example trader is Investing $100 that asset will close inside of the range by the 10:45 closing time. 24Option also offers the Range/Boundary trading feature.