My friend Markov plays until he's even, but...

[gergery]

Let's say I have a friend, we'll call him Fairly Aggressive Guy ([censored]) and he plays PotLimit poker. He has a funny style tho: He will happily quit if he gets ahead by 1 buyin or more. But if he is stuck, he will not quit unless he hits -10 buyins. I know he is a strong winning player. He has told me over the last 200 days he has played, he has 180 winning days. If it matters, his style is fairly aggressive, pushes small edges to maximize EV.

my question:
How good must his longterm winrate be to make this reasonably within the ballpark (ie. he's not running super hot)?

Or, If his longterm winrate is something like 8 PTBB/100, how likely is it that these results are typical/expected?

I'm basically trying to get a sense of "is this is realistic sustainable result, or is he full of [censored] running good"

-g