As you can see from my questions/answers, I'm always interested in finding new 
solutions. but quote me if I'm wrong: with your approach you are NOT using ONE 
equity pool.

Say you have 100k$,
with your methodology you would do one of the following:

Assign 50k$ or 50% to System1
Assign 50k$ or 50% to System2

==> Backtest and combine equity curves as you said.

Alternativley you might prop up "the result" in using 100k$ to backtest your 2 
Systems. If you operate on a non-percent-risk model, it might work, but a 
non-percent-risk model ( e.g. fixed number of shares) is not really 
state-of-art.

...just thinking out loud...


--- In amibroker@yahoogroups.com, "notanaiqgenius" <notanaiqgen...@...> wrote:
>
> Hi System Mixers,
> 
> I've been following this thread. I see people want to do different things 
> when they say mix systems. If all you want to do is backtest on daily bars 
> with multiple systems, yet be able to test each system by itself first, one 
> simple way might be to obtain each system's equity curve (preferably 
> walk-forward OOS curve), and then export that curve to a CSV file.
> 
> Once you have say, 2 or more systems that you want to time / combine, you can 
> then create a new AB database with nothing in it, and then import the equity 
> curves as pseudo/fake symbols using just Date and Close, where the Close is 
> your equity value from that system.
> 
> Then you could write one code to rank or time the equity curves.
> 
> Sure, that's quite a bit different than controlling and combining all the 
> individual orders of all the systems, but if you want to keep your system's 
> separate and just time their individual equity curves, then this sort of 
> approach might work.
> 
> The down side is that you wouldn't be able to see how much risk you are 
> taking on 1 stock. Like, if all systems pile into AAPL Long, that might be 
> pretty bad. Another down side is I could see it being a pain to update going 
> forward.
> 
> -Paul
> 
> --- In amibroker@yahoogroups.com, "Gonzaga" <gonzagags@> wrote:
> >
> > Hi. 
> > I am lately trying to mix several systems in on meta-system, and I am 
> > observing that is not difficult to obtain good CAR's with low Draw Downs.
> > For example, system 1 trade against 100 tickers of the NAsdaq-100 and 
> > system 2, against the same 100 tickers. Both systems 'compete' for the 
> > money.
> > This is a 'Meta-system', multi-system and multi-stock.
> > 
> > Well, I see it's not very difficult to obtain profitable systems..
> > I see also that a good filter to improve results is to filter every system 
> > with a volatility value of the index you are using, for example ATR of NQ, 
> > or ATR of SPX. So you trade any system in the best moment for the system.
> > You have to filter all your systems, and then, mix them in one meta-system.
> > I thing it's not very hard to obtain annualized CARs 30% and DD less than 
> > 20%.
> > BUT, it's hard to programme and backtest. 
> > Amibroker backtests very easily many stocks, but to mix several systems is 
> > a mess.. difficult and easy to fail..
> > Does anybody know a trading platform that creates this kind of meta-system 
> > easily? (perhaps trade station?)
> > Or a way to mix and backtest 2 or 3 systems easily in Ami?
> > 
> > Thanks
> >
>


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