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Registered User
Joined: 3/9/2006
Posts: 39
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Hello,
I'd like to create a reusable indicator which operates on any arbritrary indicator on my chart, not just the price array.
Details:
I'd like to be able to create and add an indicator to the library (e.g., MyScoreIndicator) which prompts for an active indicator on the chart (e.g.,1: A/D line for active watchlist; e.g.2: MyCustomIndicator etc.) and then plots itself (based on the value of the assigned indicator).
I don't see how to provide a placeholder reference in realcode for the target indicator that get's resolved dynamically .... Is this possible?
thanks.
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Registered User
Joined: 12/31/2005
Posts: 2,499
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No. You could include all possible indicators and then user a userinput.integer combined with a select statement to make a generic dynamice function. Not efficient by at least marginally dynamic
'# num = userinput.integer = 12
'# Ind01 = char.indicatorW
...
...
'# Ind12 = chart.indicator.somethingelse
dim val to use as single
select case num
case 1
val = Ind01.value
case 2
val = Ind02.value
case ...
...
...
case 12
val = Ind12.value
end select
'
' then just use val in the logic that follows
'
Alternately you could use
'# name = userinput.string = "W"
with
select case name
case "W"
val = Ind01.value
...
...
to better associate the dynamic assignment.
You still need to include all indicators that you would hope to plot. I'm not sure what the performance hit would be. It could be substantial.
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Registered User
Joined: 12/31/2005
Posts: 2,499
|
Thinking about it a little more, VB.NET does support compile time directives.
So this should do the trick
#const Test = "W"
#If Test = "W"
'# MA = chart.MovingAverage.3
#Elseif test = "X"
'# MA = chart.MovingAverage.4
#else
'# MA = chart.MovingAverage.5
#EndIf
plot = MA.close
but it doesn't, as the StockFinder preprocessor does not like multiple occurrances of MA.
So
#const Test = "X"
#If Test = "W"
'# MAW = chart.MovingAverage.3
#Elseif test = "X"
'# MAX = chart.MovingAverage.4
#else
'# MA = chart.MovingAverage.5
#EndIf
#If Test = "W"
plot = MAW.close
#Elseif test = "X"
plot = MAX.close
#else
plot = MA.close
#EndIf
works. Though you will need to edit the code a change the value of
#const Test = "W"
manually.
Not perfect but closer at least.
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Registered User
Joined: 12/31/2005
Posts: 2,499
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Note: saving the indicator with this type of compile time directive construct a block diagram with all the "conditional" indicators included. This means the complexity of the block diagram is still created even though the plot code is streamlined and only reference just one indicator.
Currently the process flow is
StockFinder preprocess ==> VB.net compile( preprocess--> compile)
To get a streamlined save indicator referencing only 1 indicator the process would need to be modified:
VB.net preprocess==>StockFinder preprocess-->VB.net compile
Alternately StockFinder could offer preprocess compile directives similar to VB.net's as in '#const and '#if, etc.
Then the code could have multiple MA references and still compile:
'#const test = "X"
'#if test = "W"
'# MA.chart.movingaverage.3
'#elseif test = "X"
'# MA.chart.movingaverage.4
'#else
'# MA chart.movingaverage.5
'#endif
plot = MA.close
which would result in code of
'# MA.chart.movingaverage.4
plot = MA.close
Then saving it would produce a block diagram with only 1 indicator embedded in the diagram.
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