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Dimitris:
Thank you for your interest in this.
I suppose the parabolic trend line is a bit like all trend lines: you draw it on the chart and adjust it manually for a “best fit.”
It hasn’t taken me long in AB to just flick through my watch list and eyeball the charts for a parabolic price rise and then just try and fit the Arc Draw tool.
I do notice that the Arc Draw tool can be moved and resized a bit to get the “best fit”. I don’t suppose that squashing the Arc Draw tool would alter the basic exponential shape of the curve, but that is way beyond my maths knowledge. What I mean is, assuming the curve is constructed on mathematical formula, would the formula change significantly if one compressed the width of the curve side to side? If not, fine. If it does then it may make creation of a search formula less reliable.
Does this make sense?
It was just an off-hand thought that it might be nice to do a Scan or Exploration for stocks which have price action which could be construed to be forming a parabolic curve. This would be based on the lows of each bar following the exponential curve.
Another issue if one were able to code this would be : how "exact" would the fit have to be, or how much leeway or latitude would one accept in how perfect/imperfect the fit would have to be.
I guess the problem is that to get the benefit of a short term rally one needs to be able to identify the parabolic nature of the trend early enough to be able to take a position, before it becomes vertical. By definition then when the trend line becomes vertical this signifies the end of the trend, and it’s time to get out, because after that prices correct downwards rather quickly.
There do seem to be a number of these patterns in the ASX market.
I am not sure if this would be seen in other markets: human nature being the same world wide, I would expect other markets to also exhibit this pattern.
Here are some examples from today’s market in Australia that fit the parabolic curve (see attached annotations)…
http://www.members.iinet.net.au/~kris.mar/AWP.png
http://www.members.iinet.net.au/~kris.mar/BBG.png
http://www.members.iinet.net.au/~kris.mar/CDO.png
http://www.members.iinet.net.au/~kris.mar/CEP.png
http://www.members.iinet.net.au/~kris.mar/IFL.png
I hope you can access these: if not I can email them to you.
Regards
Chrisb
DIMITRIS TSOKAKIS <TSOKAKIS@xxxxxxxxx> wrote:chrisb,
Is it possible to describe, in words, what do you want to do ?
It is not hard to write parabolic lines in AFL but we need some
additional info.
Example: There is only one straight line through two points, but
there are many circles/parabolas/ellipses. For these [2nd degree
lines] we need one more info [a third point, a radius, a ratio, some
curvature etc.]
Dimitris
--- In amibroker@xxxxxxxxxxxxxxx, kris45mar <kris45mar@xxxx> wrote:
>
> for anyone interested:
>
> Marcin tells me to just use the ARC drawing tool and this does
indeed work well with a bit of fiddling.
>
> Have a look see.
>
> Now, wouldn't it be nice to do a search based on this?
>
> chrisb
>
>
>
>
>
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