[R-SIG-Finance] Mathematical Expectation for a trading system

[Mark Knecht]

On Fri, Oct 16, 2009 at 2:46 AM, Mark Breman <breman.mark at 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