Stratman has published some capable code in
this thread based on earlier eKam and goose studies over at the TS forum.
The idea of opening range break out or establishing trend based on other opening range price action has been around for quite some time. It seems like every few years they add a new twist or flavor to the old indicators and call it the latest thing.
I would be very careful about believing claims of 80% accuracy or some such number in predicting trend. If it is 80%, not too many people have seen the details (actual data) of such studies. Anything approaching 80% in trading is probably not wildly published.