In-running advantage a good reason to attend racetracks?

In-Running-Advantage-RacetracksThere’s a scene in the Martin Scorsese-produced 1990 movie The Grifters in which a conman played by the late great J.T. Walsh is explaining to a potential mark how he plans to game the overseas stock market by intercepting its live feed a few seconds before the rest of North American traders see the numbers. Now a UK sportswriter is claiming you can game the in-running betting on horse races by attending the track in person. Is he on to something, or is this just a stealth campaign by cash-strapped racetracks to boost paid attendance? Read more.