they have a technology called Snicko which picks up edges, and shows them on a graph, yet they don't use it in the Review system 
and another laughable thing about the system is that if technology can't prove conclusively if the batsman is our or not, then whatever decision made by the on-field umpire stands...this "umpire's benfit of the doubt" has already cost the West Indies a test match this year

and another laughable thing about the system is that if technology can't prove conclusively if the batsman is our or not, then whatever decision made by the on-field umpire stands...this "umpire's benfit of the doubt" has already cost the West Indies a test match this year
