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I never said PFE. I was talking about Hannula's fractal efficiency
indicator in Eckhardt's article which is a variant, but what's your
point? The only practical issue I see in your previous post is that an
indicator containing the condition C-Ref(C,-9) can be dimensionally
coherent or not depending on what else is in the indicator, easily
verified by either of the two methods I posted earlier. If you want to
debate semantics, get your facts straight, start a semantics thread
and do it with someone else.
--- In amibroker@xxxxxxxxxxxxxxx, "Fred" <fctonetti@xxxx> wrote:
> I have no idea, you tell me. What I posted is the widely accepted
> formula for PFE at least in TS. If you've got a different formula
> post it.
>
> --- In amibroker@xxxxxxxxxxxxxxx, "MarkF2" <feierstein@xxxx> wrote:
> > Is that all the indicator does (subtract the close from 9 bars ago
> > from the current close)? Is that even the same formula I was
> talking
> > about? Is it possible for an indicator containing close
> > differentials to be of geometric construction? How about form a
> > geometric sequence? If so, how many different ways can this
> > theoretically be accomplished?
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Fred" <fctonetti@xxxx> wrote:
> > > 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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