Re: [amibroker] Re: Simple slippage implemented in CBT generates COM error

["Tomasz Janeczko" <groups@xxxxxxxxxxxxx>]

Hello,

Is reading the manual really that complicated?

http://www.amibroker.com/guide/a_custombacktest.html

You MUST use SetCustomBacktestProce or SetOption("UseCustomBacktestProc", True );
to use custom backtester.
Otherwise it is NOT enabled, therefore will have no impact. That is pretty obvious.

Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message ----- 
From: "ozzyapeman" <zoopfree@xxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, March 19, 2009 4:50 PM
Subject: [amibroker] Re: Simple slippage implemented in CBT generates COM error


> Still does not work. I get a COM error if the first line, SetCustomBacktestProc("");, is included for some reason. And if I take 
> that line out, it runs but has no effect. Exit prices remain unchanged.
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxx> wrote:
>>
>> you still need to loop through the signals as I think you originally
>> had, not trades.
>> then have   bo.ProcessTradeSignals( bar );  after the signal loop
>> I was just trying to show the additional lines of code you needed to include
>>
>>
>> SetCustomBacktestProc("");
>>
>> if ( Status( "action" ) == actionPortfolio )
>> {
>>   bo = GetBacktesterObject();
>>   bo.PreProcess(); // Initialize backtester
>>
>>   for(bar=0; bar < BarCount; bar++)
>>   {
>>     for( sig = bo.GetFirstSignal(); sig; sig = bo.GetNextSignal() )
>>     {
>>       if( sig.IsExit() )
>>       {
>>        if ( sig.IsLong() ) ExitTrue  = sig.Price - Slippage;
>>        else   ExitTrue  = sig.Price + Slippage;
>>        sig.Price = ExitTrue;
>>      }
>>    }
>>    bo.ProcessTradeSignals( bar );
>>   }
>>
>>  bo.PostProcess(); // Finalize backtester
>> }
>>
>>
>>
>> -- 
>> Cheers
>> Graham Kav
>> AFL Writing Service
>> http://www.aflwriting.com
>>
>
>
>
>
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------------------------------------

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