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Hi Grant,
Several hours ago I posted a reply to you with code attached, however it
has yet to show up. Maybe I've been away so long that the rules have
changed, but no matter. I'll try again and just include the code within
the message. The following will plot the Average Range as either points or
percent of average Typical price (selectable via the parameters menu (right
click the chart, select Parameters in the popup). Period for the average
is also selectable in Parameters. This uses a simple MA. MA
variations for Exp, Hull, etc. can easily be substituted, or added as parameter
selectable choices.
One note on the code Brian provided: the _expression_ H-L used in
Midpoint returns the range for only the last bar (day). As such, IMHO
it is not useful for evaluating the midpoint of each day in the average
range period. And while I didn't play with it much, I couldn't get it to
function properly in an indicator (my apologies Brian if I missed
something). As such, I find that either the MA of Close or Average [
(H+L+C)/3 ] array are useful for an indicator such as I think you
wanted. Below is the code originally attached to the missing post,
slightly modified to use AVG rather than C for the % indicator.
Enjoy.
Peace and Justice --- Patrick
// Average Daily Range
// coded by NWTrader
R = H-L;
periods = Param( "Periods", 5, 1, 65, 1
);
Display = Param("Display Points (1) or % of MA of
Typical Price (2)",
1,1,2,1
);
AR = MA(R,
Periods);
PAR = (AR/MA(Avg,periods) )*100 ;
X = IIf(display == 1, AR, PAR);
Plot ( X , WriteIf(DISPLAY==1,
EncodeColor(colorYellow) + "Average (" +
WriteVal(PERIODS,2.0) +
" period ) Daily Range (points) " ,
EncodeColor(colorBlue) + "Average (" + WriteVal(PERIODS,2.0) + " period ) Daily Range (% of C) "
),
IIf(display == 1, colorYellow , colorBlue) ,
ParamStyle(" MA Style", styleDashed | styleThick)
);
----- Original Message -----
Sent: Monday, January 28, 2008 8:00
PM
Subject: [amibroker] Re: Average
Range
Thank you very much, Brian. Percentage is exactly what I
wanted
(didn't want to ask for more than I absolutely needed,
though).
Sorry for being such a newb, but how would I plot this
formula?
--- In amibroker@xxxxxxxxxxxxxxx,
"brian_z111" <brian_z111@xxx> wrote:
>
> Actually, if I was
going standardise BarRange I would use the
MidPoint
>
>
Periods = x;
> MidPoint = (H-L)/2;
> BarRangePercent =
(H-L)/Midpoint *100;
> AveBarRangePercent =
MA(BarRangePercent,x);
>
>
> brian_z
>
> ---
In amibroker@xxxxxxxxxxxxxxx,
"brian_z111" <brian_z111@> wrote:
> >
> > Hello
Grant,
> >
> > Something along the lines of?
> >
> > Periods = x;
> > AveBarRange = Sum(H-L,x)/x;
>
>
> > You can standardise (or normalise) by converting to
%:
> >
> > BarRangePercent = (H-L)/L * 100;
> >
Periods = x;
> > AveBarRange = Sum(BarRangePercent,x)/x;
> >
> > I always normalise in situations like that.
> >
********************************************************************
>
> SUM
> > - sum data over specified number of bars Moving
averages,
summation
> >
> >
> >
> > SYNTAX sum( ARRAY, periods )
> > RETURNS
ARRAY
> > FUNCTION Calculates a cumulative sum of the
ARRAY for the
> specified
> > number of lookback periods
(including today).
> > EXAMPLE The formula "sum( CLOSE, 14 )"
returns the sum of the
> > preceding 14 closing prices. A 14-period
simple moving average
> could
> > be written "sum(C,14) /
14."
> >
>
*********************************************************************
>
>
> > You can use the Param function for periods if you want to
change
> the
> > periods from with the context menu on a
chart.
> >
> > PARAM
> > - add user user-definable
numeric parameter Exploration /
Indicators
> > (AFL 2.3)
>
>
> >
> > SYNTAX Param( ''name'',
defaultval, min, max, step, sincr = 0 )
> > RETURNS
NUMBER
> > FUNCTION Adds a new user-definable parameter,
which will be
> > accessible via Parameters dialog :
> >
right click over chart pane and select "Parameters" or press
Ctrl+R
> > allows to change chart parameters - changes are reflected
> > immediatelly.
> >
> > "name" - defines
parameter name that will be displayed in the
> > parameters dialog
> > defaultval - defines default value of the parameter
>
> min, max - define minimum and maximum values of the parameter
>
> step - defines minimum increase of the parameter via slider in
the
> > Parameters dialog
> > sincr - automatic section
increment value (used by drag-drop
> > interface to increase default
values for parameters)
> > WARNING: default/min/max/step parameters
have to be CONSTANT
> numbers.
> > This is because these
values are cached and are not re-read
during
> > subsequent
formula evaluations.
> >
> >
> > brian_z
>
>
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx,
"longarm61" <norm1@> wrote:
> > >
> > > I would
simply like an indicator that shows the average range,
> from
>
> > high to low, of x number of bars. Just the bars only.
ATR
takes
> > > into account the previous close, which I
don't want.
> > >
> > > Anyone have or can point me
to a formula for this?
> > >
> > > Thanks in
advance,
> > >
> > > Grant
> > >
>
>
>
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