Package: Progster's Flex%tile Indicator
Percentiles are one of the
foundational ideas of statistical analysis.
This indicator provides clear and simple display of
the percentile location of just about any
calculation.
Is a range narrow or wide?
Is a value high or low? To ask questions such
as these is to ask implicitly "Compared to what?".
Percentile evaluations give you the answer compared
to a set of previous observations of the same value.
(The size of the set is up to you.)
Suppose the YM is presenting a
body range of 3 points on a given day. This
may seem small intuitively, but how small is small?
How's this for an answer: "So small that only
7 out of the last 100 observations were smaller."
Now that's information you can use!
The corresponding question on
the high side would be "How large is large?".
What better answer could you have than "So large
that 19 out of 20 of the last 100 observations were
smaller." (This is the 95th %tile.)
Percentile rankings can
provide you an excellent, statistically sound notion
of what is "normal", what is "unusually high" and
what is "unusually low".
This indicator uses the
advanced Gradient Color capabilities of TradeStation
8.1 (Build 2967 or later required) to present a display that draws your
eye directly to extremes, whether they be uncommonly
high, or uncommonly low. By default, the
extremes are shown in full intensity color, while
values near the middle of the percentile range are
"washed out".
The indicator allows you to
use the same color for both extremes, or use a
different color for high vs. low extreme.
The indicator also provides
commentary on each bar to give you insight into the
derivation of the percentile ranking. The
commentary allows you to see the minimum and maximum
values observed over the sample period so you can
expand your mental picture of the range of
variability of the calculation you are measuring.
What It Looks Like

What You Get
The
#P_Flex%tile indicator (full source code).
A
demo workspace containing a preconfigured Chart and RadarScreen (same as
shown above).
Customer Support
needed to get it all
running.
What It Does
This indicator allows you to
supply any valid calculation or function call as an
input and it will calculate and display the
bar-by-bar percentile ranking of the resultant
value. You are also able to provide your own
descriptive name for the results so you can create a
display that is immediately meaningful for you!

How It Works
This indicator provides
historical or real-time percentile ranking using the
supplied custom function .
This function, PercentileThisVal.p2(), takes advantage of ADE technology to
perform a very fast (fast enough for real-time)
percentile ranking of the specified calculation.
The indicator then plots the
percentile ranking using the advanced Gradient Color
capabilities of TradeStation 8.1.
The number of observations
used for the percentile ranking is specified by the
user, so that you may choose to rank over relatively
recent observations only, or over a large number of
historical observations deeper back into time.
A special design feature of
the indicator is that you may choose to rank the
calculation against a different series of
observations than it's own past history. (Let
your imagination roam ...)
What It Costs
$200 saves you all the time,
effort, and testing you'd have to expend to create
this yourself.
How You Get It
This package will be emailed
to you after your PayPal payment is processed.
Please be aware of the
caveats
before you order.