Thanks Eric, another food for thoughts.
I jumped directly to the conclusion of this students report:
Backtesting was performed on 250 stocks from various industry
groups over the last five years (4/21/2005-4/21/2010).
The project team identified 22 stocks that perform well with the Opening Range Breakout strategy explained in section 4.6.
Accordingly to this report less than 10% of the tested stocks universe is significantly interesting for ORB. IMHO, Open Range Breakout are more tradable with indices, we have so many examples in the library and forums.
Do you have any opinion on this document yourself?