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Joined: 3/22/2010(UTC)
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Hello peeps,
I've been looking for a logical NOT operator in MetaStock, so far -- no luck :p How do you handle this in your code?
IF ( I-do-not-want-this ; 0 ; 1) ?
Any help would be greatly appreciated!
Regards,
Traetey
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Rank: Advanced Member
Groups: Registered, Registered Users, Subscribers
Joined: 10/26/2009(UTC)
Posts: 76
Location: Toronto, Canada
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Hi,
If you are using a binary value (e.i. could only have 2 values - TRUE or FALSE), Metastock recognizes 0 as False and everything else as TRUE (usually 1). So for instance
x:=Mov(C,20,S)>Mov(C,30,S);
x=0
Is the same thing as saying "I don't want the short MA to be above the long MA".
As for non-binary values (e.i. any real number) you could use the "" operator which means not equal to. So for example,
Mov(C,20,S)Mov(C,30,S)
Would mean that the 2 MA are different in actual values.
You see my logic here, you could basically manipulate most of the logical and comparison operators to achieve a state where you make Metastock make sure that one thing is NOT in some way related to another.Hope this helps.
VT
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Rank: Advanced Member
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Hi Traetey
Here are a couple of examples.
If( (condition I do not want) = 0 , 1 , 0); – If() returns a TRUE when condition is false.
If( (condition I do not want) , 0 , 1); – If() also returns a TRUE when condition is false.
If you only require a TRUE or FALSE result you can omit the If() function entirely – a statement made without a qualifying logical value (=0 or =1, =FALSE or =TRUE) is assumed to represent a TRUE (or 1) unless specifically stated otherwise. The If() function is useful when neither if the possible values returned are 0 or FALSE but it’s just unnecessary padding if the result must be TRUE and FALSE – any logical expression will do that anyway.
( condition I do not want ) = FALSE;
This above expression will return a logical TRUE when your condition is FALSE, and the expression below will return a logical FALSE when your condition is FALSE (no surprises there).
( condition I do not want )
As you can see, reversing the logical state of an expression (from TRUE to FALSE or vice versa ) is simply a matter of adding “=0” or “=FALSE” to that expression. There is no need to add “=1” or “=TRUE” when looking for a TRUE result as MetaStock assumes a TRUE is expected unless stated otherwise.
Hope this doesn’t confuse you too much.
Roy
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Rank: Member
Groups: Registered, Registered Users
Joined: 3/22/2010(UTC)
Posts: 16
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This is exactly what I've been looking for, thank you both !
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