I just updated the profitability feature.  It now shows you how much you are making (or losing) in BTC and USD per day when factoring in the cost of power to run your miners.  It will turn red if you are losing money, green if you are making money.

You can enter a 0 cost for power and it will tell you how much you are generating per day in BTC and USD without the cost of power factored in.

I've already found 3 problem miners I didn't know I had.  Hard to keep up with 34 miners ... 1 fan out (over heat and throttling) and the others overheating for some as yet unknown reason (and throttling).