[GrumpyB]

Pzhon,

Your posts are just pure class - thank you, thank you, thank you.

But can I just check that I've got this right, please:

[ QUOTE ]
[img]/images/graemlins/diamond.gif[/img] Suppose you decide you want to use comfort level 3 as a starting point, and you believe your win rate is about 15 big blinds/100 and your standard deviation is 90 big blinds/100. Bankroll = 3 * 90^2/15 = 1620 big blinds, or about 16 full buy-ins.


[/ QUOTE ]

Well I thought I'd use your forumula in reverse, just to work out my current comfort level. So I used my current figures:

Win rate: 41 bb/100
[@ NL10 over past 3,000 hands. Yes, not a big enough sample, I know, and not even typical as someone just gave me 3BI in less than 50 hands with three mega-stoopid all-ins, but lets just pretend].

Std dev: 72/100 [over 20,000 hands @ NL10, NL25 and NL50]

Bank Roll: 39 BI [@NL10]

and the formula

Comfort = [BR.WR]/V

where BR = Bank Roll, WR = Win Rate, V = Variance [SD squared]

But when I plugged in the figures [39 x 41]/[72 x 72] I got a comfort value = 0.3084

Confusion - that looks real uncomfortable - and then I see that while the SD and WR in you formula are expressed in x/100 your BR was expressed in bb. So should I really have worked this out as:

comfort = [3879 x 41]/[72 x 72] = 30.7

That would look much nicer.

[And I'm real sorry this is such a really dumb question, but I'd really like to make sure I get this.]