A "reasonable base test" is probably best defined in terms of a good representation of different types of markets (e.g., flat, up, down), as opposed to time. For example, if I happened to choose 1/1/88 - 12/31/97 as the 10 year period for DJIA, I suspect many would take a quick glance at a monthly chart and say that I chose a 10 year up market. Would one expect results from this period to be valid for a flat or down period? For those that disagree that this is an up market period, what is a good definition of market type?
Bill ----- Original Message ----- From: "Michael.S.G." <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, April 10, 2007 7:23 PM Subject: Re: [amibroker] Re: AB Trading Framework Alpha01 > Fred, > I was thinking a 10 year span would give a reasonable base test. > Then if a system looks promising, Then the user can download the system > and perform test on various other ranges to their hearts content. A > system may also be tested on a completely different data set (different > exchange) for a general robustness test. Of course a system can be curve > fit, But this would quickly be noted and posted to the comments section > by other users. As it's an open souce project, Your more than welcome to > assist in resolving or creating workarounds for such issues as you see > fit. And if you don't see backtesting as a useful tool at all, Then > there is no need to participate. > > ATB > Michael. > > > Fred wrote: >> >> As stated previously, back test stats only really tell one about how >> well one has managed to curve fit some particular system to the data >> that's in play. It tells one nothing about how any given system is >> likely to perform out of sample which is of course where all investors >> and/or traders use real money. >> >> --- In [email protected] <mailto:amibroker%40yahoogroups.com>, >> "Michael.S.G." <[EMAIL PROTECTED]> >> wrote: >> > >> > Backtest Framework is now known as "AB Trading Framework" >> > >> > It's not much, But here it is anyway.... >> > 1st Alpha release of "AB Trading Framework" is available at >> > http://www.amibroker.org/3rdparty/AB_Trading_Framework/ >> <http://www.amibroker.org/3rdparty/AB_Trading_Framework/> >> > >> >> > > > > Please note that this group is for discussion between users only. > > To get support from AmiBroker please send an e-mail directly to > SUPPORT {at} amibroker.com > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.446 / Virus Database: 269.0.0/754 - Release Date: 4/9/2007 10:59 > PM > >
