[amibroker] Simple "Days Back" Question

[Conrad Smith <conradfsmith3@xxxxxxxxx>]

Hi guys,

In the following custom indicator, I reference a day back but, for reasons that I hope are obvious to you, it throws an error.

The indicator:

PastWeight = Param("Past Data Weight", 0.1, 0.1, 2, 0.1);
NewWeight = Param("New Data Weight", 0.9, 0.1, 2, 0.1);
AdvDecEMA = (NewWeight * Ref(AdvDecEMA, -1) + PastWeight * (AdvIssues() - DecIssues());

Plot(AdvDecEMA, "McMillian Adv/Dec", colorBlue, style = styleLine, Null, Null, Null);

I've colored the problem bit in red.

Any help would be most appreciated!

Thanks,
Conrad

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