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Thanks for your help superfraga, but the formulae that you wrote, is exactly
the same that i've used in my attachment to calculate manualy the RSI.
I don't use " Big Charts". The origin of my data is a local vendor
(Brazil).
For the example I simply opened "the downloader" and copy real data of my
database (the same that MS uses to calculate its own RSI, at least I supose
!).
And the results ain't the same.
I'll try to use more data as Andrew propose.
Thanks anyway.
MORMAX.
----- Original Message -----
From: "superfragalist" <no_reply@xxxxxxxxxxxxxxx>
To: <equismetastock@xxxxxxxxxxxxxxx>
Sent: Thursday, April 28, 2005 3:45 PM
Subject: [EquisMetaStock Group] Re: RSI does anyone have tried manualy ?
> You are not going to get the same results from calculating the RSI by
> hand because you aren't going to have precisely the same pricing data
> that any automated program is using. The RSI values from MS won't be
> exactly the same as the RSI values from Big Charts.
>
> Here is the formula in algebraic terms. You would have to use exactly
> the same numbers in every case as MS is using--which probably is not
> possible. The question is how close is close enough.
>
>
>
> Average price change on up days
> Relative Strength = ---------------------------------
> Average price change on down days
>
> The indicator (RSI) is calculated from the RS value as follows:
>
> 100
> RSI = 100 - ------
> 1 + RS
>
> RS = P / N
>
> P = PS / n1 N = NS / n2
>
> PS = Total of PCi values NS = Total of NCi values
>
> PCi = positive price change NC = negative price change
> for period i for period i
>
> Pp = previous value of P Np = previous value of N
> (initially 0) (initially 0)
>
> n1 = number of times the price changed in the positive
> direction in the last n periods. There will be n1 PCi
> values to add together to get PS.
>
> n2 = number of timee the price changed in the negative
> direction in the last n periods. There will be n2 NCi
> values to add together to get NS.
>
> n = n1 + n2 (the number of periods in the RSI calculation)
>
>
>
>
> --- In equismetastock@xxxxxxxxxxxxxxx, "Mormax" <mormax_trader@xxxx>
> wrote:
>> I've tried manualy and the results wasn't the same !
>>
>> am i doing something wrong ?
>>
>> I've used the same method that MS uses to calculate de RSI (at least
> the
>> method tha's in help).
>> The results was reasonable, but not identical.
>> (the results are attached)
>>
>>
>>
>> What moving average MS uses to calculate RSI ? 'cause i've tried EMA
> too.
>>
>>
>> If anyone can help me, i'll be grateful
>>
>>
>>
>> Thanks,
>>
>> MORMAX.
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
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