Re: No QP2 / metastock calculation differences

["Ed Middleton" <jgelfand@xxxxxxx>]

Brooke,

Thanks for the feedback.  I modified my scan program and the MACD #'s for
the scan program and the chart display are close enough (i.e. accurate to 4
decimal places).  There still seems to be a difference between QP and
Metastock that I can't figure out.  Both the indicator and the explorations
(with 500 data points) in Metastock give me the same number but a bit off
from QP2.

STOCK SYMBOL: AAPL (apple computer)
MACD(QP2) = 0.2563
MACD(MS) = 0.2446

That's about as close as I can get them.  I verified all items that you
requested.  Got any other suggestions or should I know contact QP.

thanks again,
Ed

-----Original Message-----
From: Brookemail@xxxxxxx <Brookemail@xxxxxxx>
To: metastock@xxxxxxxxxxxxx <metastock@xxxxxxxxxxxxx>
Date: November 24, 1998 12:47 PM
Subject: Re: No QP2 / metastock calculation differences


>In a message dated 11/23/98 7:52:53 PM Pacific Standard Time,
jgelfand@xxxxxxx
>writes:
>> I have noticed a calculation problem which I would like
>>  someone to verify before I contact QP2.
>
>Hi, Ed:  If you use the DaysToLoad function in your MACD scans, you'll get
>values identical to those in Metastock. The MACD values depend on the
>underlying EMA's, which depend on the number of days loaded. As it says in
the
>QP help file under MACD, "Because the value of this function for any
specified
>day depends on values from previous days, you can use the DaysToLoad
function
>with MACD() to specify the number of days of data to use in calculating the
>underlying EMAs."
>
>Add this line to your scan:
>
>DaysToLoad=500;
>
>Once you've added the line, you'll find that the values are equal to those
in
>Metastock.
>
>Second, make sure you set the MACD periods in the scan so that they're the
>same as those in the QP charts. You can set the periods with a line like
this:
>
>Set MACD = 8,17,9;
>
>Third, make sure you're using exponential moving averages in your Metastock
>MACD formulas:
>
>period1:=8;
>period2:=17;
>period3:=9;
>Mov(C,period1,E) - Mov(C,period2,E);
>Mov((Mov(C,period1,E) - Mov(C,period2,E)),period3,
>
>Brooke
>
>
>