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Gordon,
Unfortunately, there is no single answer to your question.
Most of the time X and Y have the same value and this fact makes me
say they are exactly the same thing !!
They are different only
a. the "buy" day
b. the next to "buy" day
It would be better to see both in Ind. builder.
Try, for your example
Buy=Cross(StochD(),40);
Y=Ref(ValueWhen(Buy, H, 1), -1);
X=ValueWhen(Buy, H, 1);
Plot(C,"Close",1,128);
PlotShapes(shapeUpArrow*Buy,colorSeaGreen);
Plot(X,"X",colorTan,1);Plot(Y,"Y",colorBlue,8);
As you see, X and Y are the same, except the "Buy" and the next
to "Buy" bar.
In general, Ref(X,-1) is one bar ahead X graph.
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, "gordonwrose" <amibroker@xxxx>
wrote:
> Hi,
>
> I want to double check something before I use it -- if I were to
use
> the following:
>
> valuewhen(buy, h, 1)
>
> that would tell me the high on the day of the most recent buy in a
> backtest. If I then did:
>
> ref(valuewhen(buy, h, 1), -1)
>
> is that the high on the day before the buy, or the high on the day
of
> the previous buy? Thanks,
>
> Gordon
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