Since I realize I have no clue how to utilize the qfit calculator tools, I decided to ask here. I am planning on having $75 as my average bet. I want to play for 4 hours which I estimate to be 320 hands. The win rate is likely -$0.50 per hand. I believe the standard deviation is $1529 ( 1.14 x 75 x sqrt(320) ). My question is how do I calculate the odds of going bankrupt given x where x is the amount of money I bring? My friend tells me that $1529 does not mean a 16% ROR ( (100-68) /2 ) where $1529 is the given bankroll, because I thought bringing $1529 means not tapping out 16% of the time. Can someone clarify? Thanks in advance.