Science/Engineering/Technical forums

It appears some of us are interested in the business of trading, hopefully for both fun and profit.
Here's a place to talk about that. I suggest two main categories. How to trade (timeless), and what are you trading now, and why, and how it turned out. Those tend to be missing from the pro boards, so pundits can have selective memory....but that's not all that is important. Being wrong is part of the game, and how to handle it and make money anyway is crucial, for just one example.