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The arguments for IIf are (condition, truearray, falsearray). In your
first and second lines, you use a value for the "falsearray", not an
array.
Also, you seem to be trying to repeat the last value for volume when
it isn't up or down - that is, repeat the last down volume on an up
day. That will cause a falsely weighted average. For example, in a
strong up trend, the down-volume average could consist of repeated
entries of the last down day's volume. I don't have a good
work-around, unless I knew a little more about what you are trying to
accomplish.
- Bill
--- In amibroker@xxxxxxxxxxxxxxx, "l_abarr" <l_abarr@xxx> wrote:
>
> I'm new at this. I'm getting an error in the first line because the
> variable 'upvol' hasn't been initialized. I want UpVol to remain the
> same as yesterday if C < O. Thanks for any help!
>
> UpVol =IIf(C > O, V, Ref(UpVol,-1));
> DownVol =IIf(C < O, V, Ref(DownVol,-1));
> Period = Param("Period",3,2,10,1);
> UpVolAvg = EMA( UpVol, Period ) ;
> DownVolAvg = EMA( DownVol, Period ) ;
> Plot(UpVolAvg,"UpVolume", colorGreen);
> Plot(DownVolAvg, "DownVolume", colorRed);
>
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