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ExRemSpan(Buy, #holdbars) for Buy signals with ExRem(Sell, Buy) for Sell signals might get around
the Catch-22.
GRANT
gp_sydney wrote:
> Due to the way array maths works, you can't normally use operations of
> the form:
>
> <exitCondition> = BarsSince(<entryCondition>);
>
> This is because the entry array will likely have more signals than
> will ultimately be used once the exit array is defined (ie. there will
> likely be entry signals ignored because there's already a trade in
> progress), and BarsSince() will always be from the most-recent entry
> signal, even if it's one that's ultimately ignored. The first thought
> is usually to remove the excess entries with ExRem(), but you can't do
> that until after the exit array has been defined, so you have a
> Catch-22 situation.
>
> For iterative operations like this, you need to use a loop and work
> through the arrays bar by bar, so that you can both create the exit
> array and remove excess entry signals at the same time.
>
> So you don't need to use the CBT, just a loop.
>
> GP
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "trustdnb" <trustdnb@xxx> wrote:
>> Is there a way to exit unprofitable trades after a certain number of
>> bars without using the CBT? Essentially what I want is an Nbar stop
>> that only triggers on unprofitable trades, without stopping winners.
>>
>> My weak attempt did not work:
>>
>> Short = /*short fomula */;
>> ShortExit = BarsSince(Short) > 12 AND C >= ValueWhen(Short, C);
>> Cover = ShortExit;
>>
>
>
>
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