Hi Jack
When you see "Keep1:=" you know that a variable
named "Keep1" is about to be defined. The character combination of ":=" is
always followed by a definition of the variable name preceding those two
characters. Therefore, keep1:= tells us the
name of the variable about to be defined, and
Alert(haC>=haOpen,2) is the first
element or logical _expression_ of the definition that follows. There are two
components to this _expression_, the primary one being the logical test for "haC
>= haOpen". The test here asks "is the value of variable haC greater than or
equal to the value of variable haOpen?". The result or answer to this
question will be a logical TRUE or a logical FALSE, depending of course on the
relative values.
(Generally MetaStock expresses TRUE as a value of 1
(one) and FALSE as a value of 0 (zero). However there are exceptions to this
rule and until you are more familiar with MS you should be careful to not mix
logical and numerical values.)
The Alert() function is designed to extend a
logical TRUE for a given number of bars beyond where the underlying _expression_
was actually TRUE. In the case of Alert(haC>=haOpen,2) the
instruction is to extend or hold a TRUE from haC>=haOpen for one additional
bar (NOT two additional bars as you might think). A parameter of 2 in the
Alert() function means that a 1-bar TRUE value of the _expression_ contained
within it is to be extended by 1 bar. Consider the last ACTUAL TRUE of the
_expression_ parameter to be the first bar of the extension, as
in Alert(_expression_=TRUE,1) which is the same as _expression_=TRUE, and the
next bar as being the 1-bar extension. Another way to think of Alert() is
that it extends a TRUE by 1 bar less than the Periods
parameter.
If I had all day I could go on for several more
pages. If you're serious about learning MFL you need to spend a lot of time
reading, experimenting and reading again. My 10 years of learning MFL has taken
about that long to accumulate. Sure I've had a lot of help along the way, but
I've also taken the time to figure things out by myself most of the time. Don't
try to learn the whole lot at once - get a thorough understanding of one
function or element at a time. Check out the Formula Primer that's available for
free - it will help you somewhat. If you're willing to pay for more
detailed information then the MSTT Formula Language Tutorial (available on my
website) might be useful. The best MetaStock resource you'll find anywhere is
all back-issues MetaStock Tips & Tools (MSTT), but don't waste your money on
it if you aren't prepared to read and reread all the articles and work
through the hundreds of exercises.
Regards
Roy
----- Original Message -----
Sent: Monday, December 14, 2009 9:09
AM
Subject: [EquisMetaStock Group] Plain
English version of code
Hi, I'm new to this --- like to know what my technical indicators are
actually doing - use the Heikin Ashi Oscillator and can't work out what this
part of the code is actually doing.... the manual doesn't explain well enough
for me to understand.... I'd appreciate some plain English
interpretations.... Cheers,
Jack
keep1:=Alert(haC>=haOpen,2) OR
If(C>=haC,1,If(H>Ref(H,-1) OR L>Ref(L,-1),1,0));
MY
INTERPRETATION: ?
If haC>=haOpen, then keep1=2 or
If C>=haC, then
keep1=1
else if H>H from prior period, then keep1=-1
or if L>L
from prior period, then keep1=1
else
keep1=0
keep2:=ZlDif>=0;
MY INTERPRETATION: ?
If
Z1Diff>=0, then keep2=Z1Diff
keeping:=(keep1 OR keep2);
MY
INTERPRETATION:
????? I can't even guess what this
means
keepall:=keeping OR (Ref(keeping,-1) AND (C>=O) OR
C>=Ref(C,-1));
MY
INTERPRETATION:
?????
keep3:=(Abs(C-O)<(H-L)*.35 AND
H>=Ref(L,-1));
MY INTERPRETATION:
?????
utr:=Keepall OR
(Ref(keepall,-1) AND keep3);
MY
INTERPRETATION:
?????
__________ Information from ESET NOD32 Antivirus, version of virus signature database 4684 (20091213) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
__._,_.___
![]()
__,_._,___
|