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Hi,
You need to set the Automatic Analysis window settings to match your script for Long Only vs. Short Only vs. Both.
http://www.amibroker.com/guide/h_backtest.html
Alternatively, you could do it in code by setting Short and Cover to to zero. Do not assign non zero values if you don't actually want to take any short trades!
Mike
--- In amibroker@xxxxxxxxxxxxxxx, Michael <comtech.usa@xxx> wrote:
>
> I got some old code from other friends, and even for the example in the
> "sample systems" from AB,
>
> I got the same error:
>
> And it's like "Missing short/cover variables..."
>
> The code is like this:
>
> Buy = state>Ref(state,-1);
> Sell = state<Ref(state,-1);
>
> --------------
>
> To get around the error message, I added,
>
> Buy = state>Ref(state,-1);
> Sell = state<Ref(state,-1);
> Short = Sell;
> Cover = Buy;
>
> Is that a right thing to do?
>
> Thanks a lot!
>
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