>>I take initial wonder at the notion of wating for 90 minutes after the open. <<
To avoid buying at the top or shorting at the bottom, I do not initiate a trade until there is a change in the overall direction of the market from either the initial euphoria or despair that the market exibits at the opening. And my experience with FortuneQ™ has shown that that a relatively reliable signal change usually occurs after the first 90 minutes of trading.
Thanx Lee for stopping by and I look forward to your insight(s).