No breakeven analysis, but fundamentals yes. My main method of fundamentals is ween out from my universe anything suspect. So I look predominantly for what I can get rid of rather than look for what I want to trade. What's left over from the winnowing process becomes tradeable via algo signals, but then even after a signal received I will weigh up pros and cons of if it has high probability, look at the big picture, market/sector overall. My main goal is trade hard but trade safe. Very high discretionary + algo signals, been trading ~30 years.