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Graham:
You lost me. How does ROC(array, 1) =
slope? Aren't the following correct?
ROC(array, i - n) = (array(i) - array(i - n) /
array(i - n))
and
slope(i - n) = (array(i) - array(i - n)) / (i -
n)
In other words, ROC divides the difference of two
array values by the first array value and slope divides by the number of
bars. Sounds like apples and oranges to me.
What am I missing?
Bill
----- Original Message -----
Sent: Monday, July 18, 2005 2:08 AM
Subject: Re: [amibroker] Re: to calculate
the slope at any specific point on a curve by AFL.
Cond = Cross( MA (Close, 20), MA(Close, 50) );
Cond1 =
Cross( MA (Close, 50), MA(Close, 20) );
Buy = Cond;
Sell =
Cond1;
Well i pointed to using ROC
Slope20 =
ROC(ma(c,20),1);
Slope50 = ROC(ma(c,50),1);
to help yourself see
what type of results use an exploration to provide numbers
filter=cond
or
cond1;
addcolumn(slope20,"slope20,1.3);
addcolumn(slope50,"slope50,1.3);
checking
this against your charts you can work out the slope value you
want, then
add this to your buy/sell conditions, something like this
eg
buy =
cond and roc(ma(c,20),1)>0.5;
On 7/18/05, cstdc5588
<cstdc5588@xxxxxxxxx> wrote:
> Hi Graham,
>
> Thanks
a lot. You're so nice.
>
> Actually, I just need one simple
formula, i.e., when 2 moving avgs
> cross, as in this formula:
>
> ///////
> Cond = Cross( MA (Close, 20), MA(Close, 50)
);
> Cond1 = Cross( MA (Close, 50), MA(Close, 20) );
> Buy =
Cond;
> Sell = Cond1;
> ///////
>
> I hope when a
fast MA crosses a slow MA from bottom upward, the
> slope of the
crossover tangent point of the fast MA is more than
> 0.5. On the
other hand, when a fast MA crosses a slow MA from top
> downward, the
slope of the crossover tangent point of the fast MA is
> less than
-0.5. That is, the "buy" signal must satisfy the
> specified
condition and with a slope > 0.5. On the other hand,
> the
"sell" signal must satisfy the specified condition and
> with a slope
< -0.5.
>
> I understand that this slope must be calculated
first, but I
> don't know how to calculate it using AFL.
>
> Could you please help me with this function? Your help would
be
> much appreciated.
>
> Robert.
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxxx>
wrote:
> > Unless you need intensive help, or want someone else to
just write
> > them for you then stick with this group to help solve
the little
> > things.
> > Don't know of any paid service,
except maybe by AB. Checik with
> the AB
> > website and see if
anything is there.
> > Otherwise us freebie helpers can assist each
other with the
> learning curve.
> >
> > On 7/18/05,
cstdc5588 <cstdc5588@xxxx> wrote:
> > > Hi Graham,
>
> >
> > > Thanks a lot.
> > >
> > >
Because I don't know much about AFL, I need some help to do this.
> >
> I remember I've seen a link saying that someone can provide this
>
> > service (of course, there'll be a charge), but I can't find
>
> > it now. Do you know about this service? Where can I get
it?
> Any
> > > suggestions? Or do you know the
link?
> > >
> > > Robert.
> > >
>
> >
> > > --- In amibroker@xxxxxxxxxxxxxxx, Graham
<kavemanperth@xxxx>
> wrote:
> > > > just use
ROC(indicator,1) to get slope, will be expressed as Y-
> > >
value/bar
> > > >
> > > > do a search for other
posts of the same type if you want to
> > > convert to
>
> > > some other value slope.
> > > >
> >
> > On 7/18/05, cstdc5588 <cstdc5588@xxxx> wrote:
> >
> > > Hi Friends,
> > > > >
> > > >
> I want to know whether the AFL of AmiBroker could be used to
> >
> > > calculate the slope at any specific point on a curve.
>
> > > >
> > > > > For instance, if I want to
find out the slope of the point
> when
> > > a 10-
>
> > > > period moving average crosses a 20-period moving
average,
> could
> > > this
> > > > >
slope be calculated by AFL? For the slope I hope it'll be
> >
> > > expressed as 3/2 or -0.5, not as 30 degrees or 45
degrees,
> as the
> > > > > latter is too complicated
and needs to use trigonometry to
> > > calculate.
> >
> > >
> > > > > Any help would be much
appreciated
> > > > >
> > > > >
Robert.
> > > > >
> > > > >
> >
> > >
> > > > >
> > > > >
>
> > > > Please note that this group is for discussion between
users
> only.
> > > > >
> > > > > To
get support from AmiBroker please send an e-mail directly
> to
>
> > > > SUPPORT {at} amibroker.com
> > > >
>
> > > > > For other support material please check
also:
> > > > > http://www.amibroker.com/support.html
>
> > > >
> > > > >
> > > > >
Yahoo! Groups Links
> > > > >
> > > >
>
> > > > >
> > > > >
> > >
> >
> > > > >
> > > > >
> >
> >
> > > >
> > > > --
> > >
> Cheers
> > > > Graham
> > > > http://e-wire.net.au/~eb_kavan/
>
> >
> > >
> > >
> > >
> >
>
> > > Please note that this group is for discussion between
users only.
> > >
> > > To get support from AmiBroker
please send an e-mail directly to
> > > SUPPORT {at}
amibroker.com
> > >
> > > For other support material
please check also:
> > > http://www.amibroker.com/support.html
>
> >
> > >
> > > Yahoo! Groups Links
> >
>
> > >
> > >
> > >
> >
>
> > >
> > >
> >
> >
>
> --
> > Cheers
> > Graham
> > http://e-wire.net.au/~eb_kavan/
>
>
>
>
>
> Please note that this group is
for discussion between users only.
>
> To get support from
AmiBroker please send an e-mail directly to
> SUPPORT {at}
amibroker.com
>
> For other support material please check
also:
> http://www.amibroker.com/support.html
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
--
Cheers
Graham
http://e-wire.net.au/~eb_kavan/
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