I think the authors of the software missed the boat with their guidance about win rates and standard deviation. I wonder if the authors ever really played poker in a serious way or perhaps wrote the simulation to convince themselves they weren't loser but just on a really long bad run. I expect they did get the math right, but the suggested inputs are wildly wrong. Start with bad input and you get worthless output, or worse, misleading output.
To start, if you are not collecting data you do not have a clue about your standard deviation. (and for the sake of purity, if the sample size is too small to estimate win rate then the standard deviation can't be trusted either.) The software recommends 100bb/100hands as a standard deviation. That is much too high for limit poker and a too low for NL. My personal values are a standard deviation of 13bb/100 for on-line limit poker and 150bb/100 for live no limit. I play as TAG. I see LAG get values more like 17bb/100 for limit and 300bb/100 for no limit.
Same thing with an estimated win rate, if you don't collect the data your best guess isn't likely to be accurate. The simulation defaults to 2.5 bb/100, a rather good rate for a limit player but not so hot for no limit. This works out to be something $5 winnings per session of $1/$2. I totally agree that someone who measures a win rate of $5 per session in a $1/$2 no limit game has no clue if he is a winning or losing player and will never know over his/her life time if they win or lose money five bucks per night. And that doesn't matter from a bankroll perspective, since the money won or lost is meaningless. It is notable that this also means you can't pick out a +$5/100 improvement in your game, that size change is going to be overwhelmed by variance.
We know through our own observations that there are players who win a lot more than five bucks a night and others who lose a lot more. If we start with a TAG who wins "big" (a 100bb/100 winner) we get 95% confident he is a winning player after only ten sessions and get 99.9% confident after 30 sessions. The original poster plays enough to get in over 30 sessions a year - enough to be quite confident of his status if he is one of the big winners or losers.
If we take a TAG who wins $60/session at $1/$2 NLHE, it is going to take longer to reach 95% confidence - a solid 100 sessions. That surely isn't fast but way better than the vast number of sessions that commonly held myths suggest are needed. It truly doesn't take decades of live play to figure out big loser / loser / break even / winner / big winner - I can pick out the extremes in 30 sessions or less and the modest winners and losers in 100 sessions and so can you.
DrStrange
I assume you’re joking that the authors created this tool this to make themselves feel better about losing at poker
but I do agree it lacks some practical advice on answering the question of “are you a winning player or not, and to what degree”. The equations themselves are indisputable, but of course it makes many assumptions about the games and players that are definitely not 100% accurate (consistent game difficulty, opponent behaviors, etc). Calculating your precise win rate isn’t something most of us should be too concerned with, but if you’re a pro considering stepping up to a higher limit and pushing your bankroll to the limit, this type of calculation is essential if you want to understand the risks.
And I agree that different games and player types are going to yield very different stdevs. But to illustrate to the OP how many hands he needs to play to get real info on his win rate, you can use any number between 100-200bb/100 for live NL and get a pretty good idea.
I also think you’re right on with your last sentence, 30/100 sessions for extreme/average winners/losers. Because if you are a huge winner by true skill but have one of these "95% unlikely horrible runs”, you’ll probably notice that you keep getting coolered left and right, and overall running like complete garbage
It will be obvious. Again, this goes to providing a little real life context with all the math, which the author could definitely do.
In the end, it’s in everyone’s best interest for the winners and losers not to be able to readily identify themselves in the short term and win/lose all the money over just a few sessions…
I would also love to see different stdevs for each major game and player type. I imagine LAG PLO is totally insane.