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Nick -
"Just a typo ...." Close only works in horseshoes and hand grenades :-)
It appears that there might be an issue with filling in V only with price - even though it is in the help example. I suggest using C in both the write and read. Here's a demo example that should show you a couple of other things you might need to be aware of eventually with the ticker and array range that is used during the CBT pass.
Buy = 1;
Sell = Short = Cover = 0;
i = 0;
MSL = 0;
dt = DateTime( );
_TRACE( "DT[0] = " + NumToStr( dt[0], formatDateTime ) + " , Name = " + Name( ) );
for ( bar = 0; bar < BarCount; bar++ )
{
MSL[i] = dt[ bar ];
i++;
}
AddToComposite( MSL, "~MSL", "C", atcFlagDeleteValues | atcFlagEnableInBacktest );
SetOption("UseCustomBacktestProc", True );
if ( Status( "action" ) == actionPortfolio )
{
bo = GetBacktesterObject( );
MSL = Foreign( "~MSL", "C", 0 );
for ( i = 0; i < 10; i++ )
{
_TRACE( "MSL[" + i + "] = " + NumToStr( MSL[i], formatDateTime ) );
}
bo.Backtest( );
}
-- BruceR
--- In amibroker@xxxxxxxxxxxxxxx, Nick Willemse <nick.willemse@xxx> wrote:
>
> Hi Bruce,
>
> Thanks. That was just a typo from copy and paste. I've tried O, H,
> L, C, V, A, and even X to make sure it doesn't work :)
>
> nick
> On Jul 15, 2009, at 1:59 PM, bruce1r wrote:
>
> > Nick / Mike -
> >
> > I stopped by to make a post and was glancing at this. A simple error
> > kind of jumps off the page given your description - that should
> > solve the problem. Your ATC to write MSL is -
> >
> > AddToComposite( MSL,"~MSL","V", atcFlagDeleteValues |
> > atcFlagEnableInBacktest); // if i plot this it looks fine
> >
> > That's fine - odd to write it in the Volume field of ~MSL, but OK.
> > And you said that you verified the data.
> >
> > You need to read it from the same field in the CBT pass. You had -
> >
> > MSL = Foreign("~MSL", "X",0);
> >
> > Check the help file (ALWAYS!) and I don't think you'll find a "X",
> > and its not reading volume.
> >
> > Hope that helps
> >
> > -- BruceR
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Mike" sfclimbers@ wrote:
> > >
> > > This is a popular topic lately. Van Tharp must be doing well with
> > his new book ;)
> > >
> > > See my earlier post on the subject for how to calculate the risk
> > anyway you see fit. Note that the expectancy shown in that post was
> > the formula provided by the original poster, it is not the formula
> > used by Van Tharp, so refer to the methodology, but not the formula:
> > >
> > > http://finance.groups.yahoo.com/group/amibroker/message/139969
> > >
> > > Mike
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, Nick Willemse <nick.willemse@>
> > wrote:
> > > >
> > > > Hi Everyone,
> > > >
> > > > I'm trying to add Risk and R-Multiples to the TradeList. I've
> > looked
> > > > at the example using MaxLossPercent to add r-multiples and that is
> > > > pretty straight forward. However, my risk per trade is based on
> > some
> > > > multiple of the ATR. So I put the risk points per trade in an
> > array,
> > > > then I tried using the addtocomposite and Foreign functions to get
> > > > this array to the backtester section, but it seems that all the
> > data
> > > > is zero when it gets to the backtester. Is there any other way to
> > > > make this array holding the risks per trade available to the
> > > > backtester to output this for each trade?
> > > >
> > > > Here's some of the code:-
> > > >
> > > >
> > > > Risk = 2.5 * ATR(14);
> > > > i = 0;
> > > > MSL = 0;
> > > > for( bar=1; bar < BarCount; bar++)
> > > > {
> > > > if (Buy[bar] == 1 OR Short[bar] == 1)
> > > > {
> > > > MSL[i] = Risk[bar];
> > > > // _TRACE("MSL = " + MSL[i]); //this outputs correct values
> > > > i++;
> > > > }
> > > > }
> > > > AddToComposite( MSL,"~MSL","V", atcFlagDeleteValues |
> > > > atcFlagEnableInBacktest); // if i plot this it looks fine
> > > >
> > > > ...
> > > >
> > > > if(AAAction == actionPortfolio)
> > > > {
> > > > MSL = Foreign("~MSL", "X",0);
> > > > _TRACE("MSL=" + MSL[0]); // this output 0 for every index in the
> > > > array
> > > > ...
> > > >
> > > > }
> > > >
> > > >
> > > >
> > > > Nick
> > > >
> > >
> >
> >
> >
>
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