This is a discussion on Interpreting EV within the online poker forums, in the Learning Poker section; So EV is still a new concept to me. What does it mean when you have a session where your EV is negative but you 


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Interpreting EV
So EV is still a new concept to me. What does it mean when you have a session where your EV is negative but you make a profit?
So in my last session I turned a profit of 12.85bb/100 but had EV of 7.34bb/100 over 660 hands. There was one hand where I made a mistake and it cost me 100bb. Is EV important to look at or should I just focus on the profit? 
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ALL correct Fknife but if i play great poker at MTT and then at the end i lose with my AA against drawer at the bubble you know that my EV is negative for this one tournament right??? Or imagine you won one big MTT and make huge profit and lost all the others MTT u played in with smaller buy ins your EV gonna be at + . So i am just wondering what u can say about this situation...

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re: Poker & Interpreting EV
Thanks for the replies. I'm finding EV difficult to completely understand the math but I know more than I did a few hours ago.
But the simplest way I could come up with of understanding EV is about winning the most in each hand or losing the least :/ 
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Another example of EV is a donk, who shoves every hand preflop. With what hand should you call him? Obviously with anything that wins more than 50% of the time against a random hand > because its positive EV! What if he shows up with AA and stacks you? Nothing It was still a good call because his NAT ratio (nutstoair) is unbalanced (simply put he has more often trash, which you are ahead of at least more than 50% equity wise). 
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I was learning how to calculate EV recently for a live MTT hand, and wondered how useful it is in the context of a tournament. Found this article: The Fallacy of Expected Value in Tournaments I think maybe for highvolume online tournament grinders, calculating\estimating EV in tournament hands may be more useful, but I like the author's suggestions on Risk Assessment for live high buyin tourneys. I mean you can push small edges in a live tourney until you bust out and call it "playing to win", but from a risk\reward standpoint it makes more sense to do that across a high volume of low buyin tournaments online. 
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Read the article above and changing post.
I agree with the article 100%. Not sure if a high volume of low buyin tournaments will change the situation enough to make using EV valid though. It should be something that can be simulated though. 
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Similar to yourself, a few nights ago, I won a CC freeroll and yet when I went over my HH I only had one hand where I had +EV and even then it was a very small positive value. The article linked to by rifflemao (The Fallacy of Expected Value in Tournaments (http://www.wptmag.com/wptacademy.php?articleID=28)) puts this in context to some extent. Lake many of the mathematical concepts in poker EV is too complicated, for me at least, to calculate during a game even using an odds calculator as I have yet to find one that I can operate quickly enough in the time allowed. 
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Thanks guys this is great stuff. I've figured out one thing probably causing low EV and it was my hero calls. Just ended a session and although I still made some dumb moves near the end of my session due to lack of concentration, my EV was above my bb/100 so Im guessing that is a good thing.
Any more notable articles or content you find post it up great stuff 
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re: Poker & Interpreting EV
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Its rarely correct to make ev plays. 
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essentially you are getting lucky, i think you should definitely look at ev to make sure you are making as many correct decisions as possible. If over a large sample size your ev adjusted winnings are way below you're total winnings you most likely have some leaks that you need to fill in

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Just had another session where I turned a profit and have EV. Bit frustrating because will probably get killed in the long run if this keeps happening. Also is it common for a great player when running bad to have negative profit but positive EV if they play to their best of their ability? Or do negative profit and negative EV usually go together even if you are playing decent

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As you play more hands, mathematically in the long run your results will level to the point where your EV plays end up costing you more than what you take in. 