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It is ? I wouldn't call any indicator that's subtracing the close
from 9 bars ago from the current bars of geometric construction,
would you ?
>From the TradeStation code ...
vars: PFE(0), C2C(0), COUNTER(0), FRACEFF(0), EMA(0);
PFE = 0;
C2C = 0;
COUNTER = 0;
FRACEFF = 0;
EMA = 0;
PFE = Squareroot(Power(Close - Close[9], 2) + 100);
for COUNTER = 1 to 9 begin
C2C = C2C + Squareroot(Power((Close[COUNTER - 1] - Close
[COUNTER]),2) + 1);
end;
if (Close - Close[9]) > 0 then
FRACEFF = Round((PFE / C2C) * 100,0)
else
FRACEFF = Round(-(PFE / C2C) * 100,0);
if Currentbar = 1 then
EMA = FRACEFF
else
EMA = Round((FRACEFF * 0.333) + (EMA[1] * (1 - 0.333)),0);
Plot1(EMA,"E");
Plot2(50,"BUYZONE");
Plot3(-50,"SELLZONE");
--- In amibroker@xxxxxxxxxxxxxxx, "MarkF2" <feierstein@xxxx> wrote:
> All systems that behave accordingly are dimensionally coherent. But
> need to be careful about generalizing that all geometric indicator
> constructions, for example, are dimensionally coherent. Hans
Hannula's
> fractal efficiency indicator is a geometric construction but it
> combines price and time variables so that the indicator doesn't
retain
> the relative importance of price and time changes when the axes are
> rescaled independently of each other. But some people would never
see
> that from just looking at the formula, which is why I suggested the
> simple and simpler approaches.
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Fred" <fctonetti@xxxx> wrote:
> > But the simplistic explanation remains the same ... doesn't it ?
The
> > simple and/or complex systems I write and trade could care less
if
> > prices are factored up or down by 100.
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "MarkF2" <feierstein@xxxx>
wrote:
> > > Fred- If you want simplistic, I'll give you simple and
simpler :-)
> > >
> > > 1. Simple. Apply Eckhardt's c-Test for dimensional coherency:
> > > "In essence, the c-test transforms relevant formulas in an
indicator
> > > or system by multiplying every price term by a positive
constant c
> > (c
> > > not equal to 1), while leaving nonprice terms the same. If the
> > > transformed indicator or system gives the same indications or
> > signals
> > > as the original, then it has passed the c-test. If not, the
> > > formulation in question is incoherent and depends unacceptably
on
> > the
> > > units chosen."
> > >
> > > 2. Simpler. Make two test data files, one with actual data and
the
> > > second with the price terms multiplied by a constant not equal
to
> > 1.
> > > put them in a single group and have AmiBroker do the work by
> > comparing
> > > indicators and test results on the two files.
> > >
> > > You can use these tools to test your theory which, by the way,
with
> > > complex formulas, is not a simplistic approach :-)
> > >
> > > Mark
> > >
> > >
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, "Fred" <fctonetti@xxxx> wrote:
> > > > Correct me if I'm wrong, but in my wanting to think of things
in
> > > > simplistic terms what I get out of this is, if one constructs
> > > systems
> > > > based on geometric oriented relationships then the
relationship
> > is
> > > > the same after the change as it was before but not so with
> > devices
> > > > constructed based on arithmetic relationships. This is
roughly (
> > > or
> > > > more so ) equivalent to viewing charts based on a log
scale .vs.
> > on
> > > > an arithmetic scale, the second of which by definition
provides a
> > > > distorted view.
> > > >
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