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Re: Walk-forward. What is it.



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Paul,
Thanks!  That is exactly what I am doing on my web site.  I am making the
signals ( entries, stops, etc ) all know  on my website the day before the
are needed.  That's about as close to real trading as I can get on such a
site ( that I know of any way ).  Thanks again for your comments.

All the Best!
Bill Shumake

-----Original Message-----
From: Paul Brittian <tradeblt@xxxxxxx>
To: RealTraders Discussion Group <realtraders@xxxxxxxxxxxxxx>
Date: Tuesday, July 07, 1998 10:53 PM
Subject: Re: Walk-forward. What is it.


>Gentlemen,
>The only way a "walk forward" system has any validity is if all the
>market entry signals as well as the stop losses are posted and published
>before entering the market.  This method is far more real than the CFTC
>and NFA required VAMI or CTA diaclosure.
>Paul Brittain
>http://www.tradeblt.com
>
>bshumake wrote:
>>
>> To All RealTraders:
>>
>> I have apparently misused the term walk-forward testing, when I should
have
>> said "paper trade" or "simulated trading."  All my we site is doing is
>> taking a purely mechanical trading system that I developed and is now
"paper
>> trading"  the signals generated by it for all to see.  The system is not
>> being change or optimized in any way.  Please note that I have NOT used
>> optimization in the development of this system.  So I guess I am not
>> "walk-forward" testing this system, I am just hypothetically trading the
>> signals it generates to see if it makes money and inviting everyone to
>> watch.  The system lives or dies by it's own merits, but I am not trying
to
>> optimize it.  Just paper trading to see if it makes money.  Sorry for the
>> misused term, I did not mean to cause such confusion.  Now...let's see
what
>> happens with these paper trades.
>>
>> All the Best !
>> Bill Shumake
>>
>> -----Original Message-----
>> From: Bill Bancroft <bancroft@xxxxxxxxxxxxxxx>
>> To: RealTraders Discussion Group <realtraders@xxxxxxxxxxxxxx>
>> Date: Tuesday, July 07, 1998 4:02 PM
>> Subject: Re: Walk-forward. What is it.
>>
>> >Walk-forward testing is where one optimizes a system over the most
recent
>> >time-period and then uses the parameters generated by the optimization
for
>> >the next time period.  For example, consider a simple moving average
>> >crossover system.  It buys when the price is above the average, and
sells
>> >when price is below the average.  Let's say we want to use walk-forward
>> >testing to arrive at the length of the average.  We would take the last
>> >year's of data and optimize to find out what moving average length was
the
>> >most profitable.  We would then trade that moving average for this
coming
>> >year.  At the end of this year (and every future year), we would repeat
>> this
>> >process.  So we could be trading a 10-day average in 1998, but in 1999,
we
>> >could be trading a 20 day average.
>> >
>> >Regards,
>> >
>> >Bill Bancroft
>> >
>> >BrentinUtahsDixie wrote:
>> >
>> >> I have never understood this walk forward stuff and a quick search of
the
>> >> web turned up nothing. Would anyone care to elaborate.
>> >>
>> >> Brent
>> >>
>> >> > Walk forward is a hoax and a sad one at that. Walk forward means to
>> >> reoptimize the system on new
>> >> > data as the new data is available.
>> >
>> >
>> >