Re: [amibroker] Why is there such an arithmetic error for a very simple calculation?

[Graham <kavemanperth@xxxxxxxxx>]

just rounding errors of the EMA(L, 21), use more decimal places in
your calculator
21.84767 instead of 21.85

-- 
Cheers
Graham Kav
AFL Writing Service
http://www.aflwriting.com



On 16/01/2008, ezbentley <ezbentley@xxxxxxxxx> wrote:
> Please try the following very simple Exploration on INTC on 6/13/2007:
>
> //////////// Code begins ////////////
> HighEMA = EMA(H, 21);
> LowEMA = EMA(L, 21);
>
> MaxTradeLoss = C - LowEMA;
> MaxPercentLoss = C / MaxTradeLoss;
>
> Filter = Cross(C, HighEMA);
> AddColumn(C, "Close");
> AddColumn(LowEMA, "LowEMA");
> AddColumn(MaxTradeLoss, "MaxTradeLoss");
> AddColumn(MaxPercentLoss, "MaxPercentLoss");
> //////////// Code ends ////////////
> /*
> Exploration shows:
> INTC 6/13/2007 Close = 22.67 LowEMA = 21.85
>                MaxTradeLoss = 0.82 MaxPercentLoss = 27.57(?)
> */
>
> The Exploration showed that MaxPercentLoss = 27.57, however, 22.67 / (22.67 - 21.85) is
> actually equal to 27.6463.
> Does anyone know why Exploration gives slightly different number for such a simple
> calculation?
> Any help is greatly appreciated.


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