Hi Mark,
You are right: it is P = #winners / #trades

Thank you,

-Mark-

2009/10/16 Mark Knecht <markknecht@gmail.com>

> On Fri, Oct 16, 2009 at 2:46 AM, Mark Breman <breman.mark@gmail.com>
> wrote:
> > I think I found the answer for calculating the Mathematical Expectation
> (as
> > intended by Ralph Vince):
> > P = #winners / # losers
>
> Is it #winner/#losers or is it #winner/#trades ?
>
> Either can be true but I think the latter is more common in my
> experience as it yields a value between 0 and 1.
>
> good luck,
> Mark
>

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