RE: [amibroker] Re: explanation of code

["Terry" <MagicTH@xxxxxxxxxxx>]

Not following your request. AMA just accepts a variable period defined
as you wish, for example an RSI value, thus dynamically changing the EMA
period. It needs to be in percent instead of days. Formula for days to
percent is: percent = 2/(days + 1);

Here's the example from Help cleaned up a bit:

fast = 2/(2+1);
slow = 2/(30+1);
dir = abs(Close - Ref(Close,-10));
vol = Sum(abs(Close - Ref(Close,-1)),10);
ER = dir / vol;
sc =(ER * (fast - slow) + slow)^2;

Plot(C,Name(),colorLightGrey,styleBar);
Plot(EMA( Close, 15 ),"EMA15",colorBlue);
Plot(AMA( Close, sc ),"AMA",colorRed);
Plot(sc,"sc",colorGreen,styleOwnScale);
--
Terry
| -----Original Message-----
| From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On
| Behalf Of Eugene
| Sent: Sunday, July 10, 2005 04:44
| To: amibroker@xxxxxxxxxxxxxxx
| Subject: [amibroker] Re: explanation of code
| 
| Thanks
| 
| Can you take a stop and convert this code to ama so that I get an idea
| of what it does?
| 
| TIA?
| 
| 
| --- In amibroker@xxxxxxxxxxxxxxx, "Terry" <MagicTH@xxxx> wrote:
| > I put your code in AB 4.7. I get no errors and no warnings. It says:
| > "...approximately 72 past and 0 future quotes..."
| >
| > FYI: There is a variable EMA function called AMA so you don't have
| to
| > build your own looping code.
| > --
| > Terry
| >
| > t=Param("t",10,10,30,5);
| > y=RSI(t)/100;
| > RSIema1=C;
| > RSIema2=C;
| > for(i=t;
| > i<BarCount;i++)
| > {
| >     RSIema1[i]=y[i]*C[i]+(1-y[i])*RSIema1[i-1];
| >     RSIema2[i]=(1-y[i])*C[i]+y[i]*RSIema2[i-1];
| > }
| > Plot(C,"C",1,8);
| > Plot(RSIema1,"RSI_ema1",colorRed,1);
| > Plot(RSIema2,"RSI_ema2",colorBrightGreen,1);
| 
| 
| 
| 
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