This sentiment may have had its genesis in the following thread:

@ToddStottlemyre @IRON100 Interesting conversation. I trade w/stops of course but watch a real-time P&L -allows me to trade 8-10 positions

Here’s my view on the importance of the P/L in trading:

By no means am I saying cut your trade if you are down a penny.  That said, nothing tells you more clearly how you are doing than your P/L.  Unlike your emotions which say to you, ” . . .  just hang in there buddy”, your P/L is constantly spitting out the truth:

I am winning . . . or I am losing.  Period.

P/L is at the core of money and risk management and without knowing what is going on in real-time you are on a path to failure.  

Granted there’s more than just looking at it and stopping trades if you dip into the red.

You not only need to know your P/L you need to understand it with answers to these questions:

Know these answers, understand the odds of the pattern to be traded in the market, and you’re ready for anything the market throws at you.  Maybe there’s no disagreement afterall – we both wind up at the same conclusion from 2 different paths: No emotion, no surprises – all reaction.