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That should read:
Sell = Ref(ExRemSpan(Buy, 5), -5);
http://www.amibroker.com/guide/afl/afl_view.php?id=50
Mike
--- In amibroker@xxxxxxxxxxxxxxx, "Anthony Faragasso" <ajf1111@xxx> wrote:
>
> Did you try:
>
> Sell=exremspan(buy,5);
>
>
> ----- Original Message -----
> From: Tao
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Thursday, March 04, 2010 5:17 PM
> Subject: [amibroker] Help Please !!!How to control sell time with Barsince for more than 1 stocks?
>
>
>
> Hi,
>
> Basically I scan 500 stocks everyday to find stocks that have buy signal(such as price have crossed MA 50). Then I buy the stocks and exit them in 5 days after I boought them.
>
> MA=EMA(C,50);
> Buy = Cross( MA, C );
> Sell = BarsSince(Buy)>5;
>
> But the backtester don't sell stocks exactly 5 days after I bought them.
>
> Say yesterday I bought stock A, today I bought stock B.
> The backtester will sell both A and B 5 days after today, which is not what I really want!
>
> What I want is to sell stock A 5 days after the time I bought A which is yesterday not today.
>
> Basically I want to have sell time for each stock to be 5 days after their individaul purchase dates.
> But "Sell = BarsSince(Buy)>5;" can't do that.
>
> Please help!
>
> Thanks a lot
>
> Tao
>
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