|
PureBytes Links
Trading Reference Links
|
I think the way you implement has similarity with how the pivot finder is calculated. Would it mean if you see a buy signal and see after few days the price start cut the parabolic trend line and start to move sideways you has to be careful and prepare to leave possible with a stop order.
But sometime the price could follow the trend again (the 5% approx rule: if C not falling more then 5%, trend is still not broken), so I like to use other indicator to confirm\ or prepare. For example open and close a trade using this folling method:
a) The D-day: If parabolic Trend shows an uptrend for 2 consecutive days and MFI() has given a positive signal in the last 5 days, only then the parabolic trend buy signal is confirmed. and
b) The pill after:
If parabolic trend has given a positive buy signal, but when in the next 2 days if an very-heavy-Z indicator issues a sell signal then, total is a sell signal
It would be very helpful and educative for me if you could show how do I have to code this? (in an complex and\or a simple but effective ways if possible)
Plus, how would you code so that MFI() and parabolic trend line can be shown in ONE chart (general different scale problem)
DIMITRIS TSOKAKIS <TSOKAKIS@xxxxxxxxx> wrote:
Khai,
Well, p0 and p1 are the boundaries of the parabolas.
The best-fit parabolic should lie somewhere between, but the
boundaries should cover a relatively wide range.
In order to avoid extremes, I plot them between LLV(L,200) and HHV
(H,200), I think it is good [you may change 200 to 100 or 500 anyway]
Here is the full code :
Plot(C,"C",1,64);
perc=3;//sensitivity calibration
x=BarIndex();xx=LastValue(x);
t1=LastValue(ValueWhen(PeakBars(H,perc)==0,x));
H1=LastValue(ValueWhen(PeakBars(H,perc)==0,H));
t11=LastValue(ValueWhen(TroughBars(L,perc)==0,x));
H11=LastValue(ValueWhen(TroughBars(L,perc)==0,L));
g=t1>t11;
shape=IIf(g,shapeDownArrow*(x==t1),shapeUpArrow*(x==t11));
Color=IIf(g,colorRed,colorBrightGreen);
PlotShapes(shape,color);
t=IIf(g,x-t1,x-t11);
diff1=IIf(g,H1*(xx-t1),H11*(xx-t11));
Lma=LastValue(MA(C,50));
f1=0;f2=IIf(Lma<100,1,0)+3*int(log10(Lma));
fa=0;fb=0;step=f2/100;
for(f=f1;f{
parabolic=IIf(g,H1-f*t^2,H11+f*t^2);
S1=LastValue(Sum(abs(parabolic-H),xx-t1));
S11=LastValue(Sum(abs(parabolic-L),xx-t11));
diff=IIf(g,S1,S11);
if(diff{
diff1=diff;fa=f;
}
}
for(f=Max(fa-step,0);f{
parabolic=IIf(g,H1-f*t^2,H11+f*t^2);
S1=LastValue(Sum(abs(parabolic-H),xx-t1));
S11=LastValue(Sum(abs(parabolic-L),xx-t11));
diff=IIf(g,S1,S11);
if(diff{
diff1=diff;fb=f;
}
}
p=IIf(g,H1-fb*t^2,H11+fb*t^2);
p0=IIf(g,H1-f2*t^2,H11+f2*t^2);
p0=IIf(p0>LLV(L,200) AND p0p1=IIf(g,H1,H11);
Plot(IIf(x>=Max(t1,t11),p,-1e10),"",color,8);
Plot(IIf(x>=Max(t1,t11),p0,-1e10),"",color+1,1);
Plot(IIf(x>=Max(t1,t11),p1,-1e10),"",color+1,1);
Title=Name()+", "+WriteIf(t1>t11,"f_desc","f_asc")+"="+WriteVal
(fb,1.4);
GraphXSpace=3;
p1 will be horizontal, p0 will be sharp enough [some times will not
be visible, when the very next [after the peak] price is out of
limits].
p0 and p1 colors are next shades to the main parabolic [color,
color+1].
Dimitris
--- In amibroker@xxxxxxxxxxxxxxx, Khai Nguyen wrote:
> Could it be it is like this:
> "
> // The last best-fit parabolic trendline, by D. Tsokakis, Sept2004
> Plot(C,"C",1,64);
> perc=3;//sensitivity calibration
> x=BarIndex();xx=LastValue(x);
> t1=LastValue(ValueWhen(PeakBars(H,perc)==0,x));
> H1=LastValue(ValueWhen(PeakBars(H,perc)==0,H));
> t11=LastValue(ValueWhen(TroughBars(L,perc)==0,x));
> H11=LastValue(ValueWhen(TroughBars(L,perc)==0,L));
> g=t1>t11;
> shape=IIf(g,shapeDownArrow*(x==t1),shapeUpArrow*(x==t11));
> Color=IIf(g,colorRed,colorBrightGreen);
> PlotShapes(shape,color);
> t=IIf(g,x-t1,x-t11);
> diff1=IIf(g,H1*(xx-t1),H11*(xx-t11));
> Lma=LastValue(MA(C,50));
> f1=0;f2=IIf(Lma<100,1,0)+3*int(log10(Lma));
> fa=0;fb=0;step=f2/100;
> for(f=f1;f> {
> parabolic=IIf(g,H1-f*t^2,H11+f*t^2);
> S1=LastValue(Sum(abs(parabolic-H),xx-t1));
> S11=LastValue(Sum(abs(parabolic-L),xx-t11));
> diff=IIf(g,S1,S11);
> if(diff> {
> diff1=diff;fa=f;
> }
> }
> for(f=Max(fa-step,0);f> {
> parabolic=IIf(g,H1-f*t^2,H11+f*t^2);
> S1=LastValue(Sum(abs(parabolic-H),xx-t1));
> S11=LastValue(Sum(abs(parabolic-L),xx-t11));
> diff=IIf(g,S1,S11);
> if(diff> {
> diff1=diff;fb=f;
> }
> }
> p=IIf(g,H1-fb*t^2,H11+fb*t^2);
> p0=IIf(g,H1-f2*t^2,H11+f2*t^2);
> p1=IIf(g,H1,H11);
> //p0=IIf(p0>LLV(L,200), p0, p1=IIf(g,H1,H11));
> Plot(IIf(x>=Max(t1,t11),p,-1e10),"",color,8);
> //Plot(IIf(x>=Max(t1,t11),p0,-1e10),"",color+1,1);
> Plot(IIf(x>=Max(t1,t11),p1,-1e10),"",color+1,1);
> Title=Name()+", "+WriteIf(t1>t11,"f_desc","f_asc")+"="+WriteVal
(fb,1.4);//+"[f2="+WriteVal(f2)+",step="+WriteVal(step);
> GraphXSpace=3;
> "
> PS:
> "The Strange Plot"
> I have to tyake one line of your code out "
> Plot(IIf(x>=Max(t1,t11),p0,-1e10),"",color+1,1);" because it shows
an heavy upwards parabol while price remains in a flat line because
the scale too different. (It thows an interesting question: How would
you normalise two graphs of different scale for example MACD and TSV
so that we can monitor theirs behaviour on one chart only?)
>
> Could you explain what that line plots? An expected trend? In that
case many stock trade sideways but trendline shown strongly up.
>
> Thanks for the formula, and thank for your time to explain or
correct "the strange plot"
>
>
>
>
> Khai Nguyen wrote:
>
> DT,
>
> The formula on Elitetrader contains errors. Please correct them.
>
>
>
> ---------------------------------
> ALL-NEW Yahoo! Messenger - all new features - even more fun!
>
> [Non-text portions of this message have been removed]
>
>
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
> Check group FAQ at:
http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> Yahoo! Groups Links
>
>
>
>
>
>
>
> ---------------------------------
> ALL-NEW Yahoo! Messenger - all new features - even more fun!
>
> [Non-text portions of this message have been removed]
Check AmiBroker web page at:
http://www.amibroker.com/
Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Yahoo! Groups Links
---------------------------------
ALL-NEW Yahoo! Messenger - all new features - even more fun!
[Non-text portions of this message have been removed]
------------------------ Yahoo! Groups Sponsor --------------------~-->
Make a clean sweep of pop-up ads. Yahoo! Companion Toolbar.
Now with Pop-Up Blocker. Get it for free!
http://us.click.yahoo.com/L5YrjA/eSIIAA/yQLSAA/GHeqlB/TM
--------------------------------------------------------------------~->
Check AmiBroker web page at:
http://www.amibroker.com/
Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|