Keith,
Buy = Ref( Buy, -1 ) is not ambiguous.
It will behave exactly has you have proposed in your workaround (i.e.
will internally create a temporary array holding Ref(Buy, -1) which
will then be assigned to Buy).
It does, however, require that Buy has already been initialized
before this statement.
Mike
--- In amibroker@yahoogroups.com
<mailto:amibroker%40yahoogroups.com>, Keith McCombs <kmcco...@...> wrote:
>
> I gave this thread a new name because TJ's response brought up a much
> more general concern, for me, than the original title expressed.
>
> I thought that statements such as "Buy = ref( Buy, -1 );" were
ambiguous
> and therefore should not be used. The reason being that if the array
> valuation moves forward in time (Buy[n] evaluated before Buy[n+1])
then
> all Buys will be equal to Buy[0]. However if valuation moves backward
> (Buy[n+1] before Buy[n]) then a much different result is produced.
>
> Therefore, one should instead use something like this:
> temp = ref(Buy, -1);
> Buy = temp;
>
> Hopefully someone will clear up my confusion.
> Thank you.
> -- Keith
>
> On 4/20/2010 19:10, Tomasz Janeczko wrote:
> >
> > Hello,
> >
> > >SellPrice = Ref(O, 1);
> >
> > Wrong advice.
> > Once again: NEVER move trading prices using ref().
> >
> > Instead delays SIGNALS
> > Buy = ref( Buy, -1 );
> > Sell = ref( Sell, -1 );
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> >
> > On 2010-04-21 00:54, hiscores wrote:
> > > There are numerous ways to do this, but here is a simple one
> > >
> > > Buy = C> MA(C, 20);
> > > BuyPrice = C;
> > >
> > > StopLoss = C< MA(C, 50);
> > > ProfitTarget = C> MA(C, 10);
> > >
> > > Sell = StopLoss OR ProfitTarget;
> > > // If we exit due to stop loss take the 50 MA otherwise
> > > // by process of elimination we exit at target 10 MA
> > > SellPrice = iif(StopLoss, MA(C, 50), MA(C, 10));
> > >
> > > This is here so you can learn how to code such rules, but I should
> > point out that your strategy is unrealistic! You are making a rule
> > where if at the END of a bar we are below an MA we should sell at a
> > price ABOVE the close (ie the MA price that price action is now
> > below). Furthermore the MA will not settle to its final value until
> > the bar is finished (since the MA is calculated on closing prices).
> > You should probably set your sell prices to the open of the next bar
> > >
> > > SellPrice = Ref(O, 1);
> > >
> > > -hi
> > >
> > > --- In amibroker@yahoogroups.com
<mailto:amibroker%40yahoogroups.com>
> > <mailto:amibroker%40yahoogroups.com>,
> > "dralexchambers"<dralexchambers@> wrote:
> > >
> > >> Hi,
> > >>
> > >> How would I put together a backtest for the following. My Buy
> > signal is:
> > >>
> > >> Buy = C>MA(C,20);
> > >>
> > >> How do I do a multiple sell signal for the following:
> > >>
> > >> StopLoss is hit is when C< MA(C,50) Stoploss price is MA50.
> > TakeProfit is when C> MA(C,10), and TP price is MA10.
> > >>
> > >> I can only see one Sell& Sellprice variable. How do I put both of
> > these conditions into Sell& Sellprice?
> > >>
> > >> Thanks,
> > >> Alex
> > >>
> > >>
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > **** IMPORTANT PLEASE READ ****
> > > This group is for the discussion between users only.
> > > This is *NOT* technical support channel.
> > >
> > > TO GET TECHNICAL SUPPORT send an e-mail directly to
> > > SUPPORT {at} amibroker.com
> > >
> > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> > > http://www.amibroker.com/feedback/
<http://www.amibroker.com/feedback/>
<http://www.amibroker.com/feedback/ <http://www.amibroker.com/feedback/>>
> > > (submissions sent via other channels won't be considered)
> > >
> > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > > http://www.amibroker.com/devlog/
<http://www.amibroker.com/devlog/> <http://www.amibroker.com/devlog/
<http://www.amibroker.com/devlog/>>
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> >
> >
>
