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Eve
Joined: 28 Mar 2012
Posts: 19
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 Posted: Fri Apr 06, 2012 10:02 am Post subject: Indicator return value |
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Hello!
I've programmed the indicator which i would like to use inside the strategy. The indicator is working fine but the problem is that at this point it's just graphical solution which means that it's just drawing some lines and not returning any values which i could use while prgramming the strategy.
How can I do that?
If I want to return the value which i could later grab with the GetIndicatorValue function what should i change inside the Calculate procedure?
Thanx a lot! |
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FT Support
Joined: 11 Jul 2009
Posts: 901
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| Posted: Sat Apr 07, 2012 7:33 pm Post subject: |
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Hello,
Is it correct that you're just using graphical objects instead of buffers?
You can only get buffers values with GetIndicatorValue but not objects values.
There are 2 options how you can transfer indicator values to the strategy:
1) create invisible buffers (recommended)
2) export objects information into the files and then read these files with strategy.
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Eve
Joined: 28 Mar 2012
Posts: 19
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| Posted: Tue Apr 10, 2012 8:35 am Post subject: |
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Thank you for the reply!
I have a problem using GetIndicatorValue function. I'm getting zero value all the time... Can you please explain the parameters of the function a bit more? I've read the help files but i'm still not sure that i'm using it correctly.
I have 3 visible buffers and one invisible buffer in the indicator which i listed in that order (inside the indicator). Is the Buffer Index automaticly selected or? Should the bufferIndex for the invisible buffer in this case be number 3?
And what about index inside the indicator's buffer? If u understood it correctly that's the index as the index of a bar??
Thank you in advance! |
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Eve
Joined: 28 Mar 2012
Posts: 19
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| Posted: Tue Apr 10, 2012 3:37 pm Post subject: |
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Just to explain it into a little bit more details...
Inside the indicator i created index buffer which i would like to get from the strategy with:
TIndexBuffer izlaz;
inside the init procedure:
izlaz=CreateIndexBuffer();
SetIndexBuffer(10,izlaz);
and just so i can check if it's working inside the calculate procedure i put the line:
izlaz[0]=555;
inside the strategy i'm trying to get the value with the following code:
int indicatorMoje;
double VrijednostMoje;
inside the reset procedure:
sprintf(buff1,"%d;%d;%d;%d;Close;Yes;No;No;No;Yes;%d;Yes;Yes;0.001;No;No",9,4,6,7,1 ;
indicatorMoje=CreateIndicator(Currency, TimeFrame, "Moje", buff1);
inside the GetSingleTick procedure:
VrijednostMoje=GetIndicatorValue(indicatorMoje,0,10);
sprintf(pomocno,"%f", VrijednostMoje);
Print(pomocno);
In the end it's printing only zeros... What am I doing wrong? |
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FT Support
Joined: 11 Jul 2009
Posts: 901
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| Posted: Tue Apr 10, 2012 7:30 pm Post subject: |
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Hello Eve,
Can you receive the values of other buffers?
did you get indicator handle in "indicatorMoje" variable or it is equal to 0 ?
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Eve
Joined: 28 Mar 2012
Posts: 19
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| Posted: Wed Apr 11, 2012 7:02 am Post subject: |
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Hi,
Yes, I got indicator handle in "indicatorMoje"; tried to print it and everything was ok...
But I keep receiving zeros for all buffers... |
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Eve
Joined: 28 Mar 2012
Posts: 19
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| Posted: Wed Apr 11, 2012 7:07 am Post subject: |
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is it ok to use
izlaz[0]=555;
the way i described above to set the indicator to that value? |
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Eve
Joined: 28 Mar 2012
Posts: 19
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| Posted: Wed Apr 11, 2012 7:18 am Post subject: |
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I figured it out! 
Thank you for the help! |
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edoughig
Joined: 15 May 2013
Posts: 7
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| Posted: Fri May 17, 2013 8:25 pm Post subject: |
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| Eve wrote: | I figured it out!
Thank you for the help! |
What did you figure out as I am having the same issue. All I get are 0.0s from my custom indicator. Here's some code.
In ResetStrategy:
if(FGDIHandle == -1)
{
char fgdiInputs[1000];
sprintf(fgdiInputs, "%d;%d;%f;%f;", FGDIPeriod, FGDIPriceType, FGDIRandomLine, FGDIStdDevs);
FGDIHandle = CreateIndicator(Currency, Timeframe, "FGDI", fgdiInputs);
}
In GetSingleTick:
double fgdiLower = GetIndicatorValue(FGDIHandle, Shift, 2);
double test = GetIndicatorValue(FGDIHandle, Shift, 0);
double test1= GetIndicatorValue(FGDIHandle, 0, 2);
double test2 = GetIndicatorValue(FGDIHandle, 0, 0);
The indicator has 3 visible buffers and it prints fine in history mode attached to a chart. I am trying to get the last index/bar value of the third buffer (index 2). As a test I added the above calls to try to retrieve the 0-index value from buffer index 0 and 2, but no luck. I keep getting 0.0 on every bar...
Any ideas? And yes, FGDIHandle is valid and the journal shows that my indicator was created with the proper inputs.
EDIT: I should add that I can retrieve valid values from a built in indicator "ZigZag". |
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edoughig
Joined: 15 May 2013
Posts: 7
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| Posted: Fri May 17, 2013 9:25 pm Post subject: |
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| edoughig wrote: | | Eve wrote: | I figured it out!
Thank you for the help! |
What did you figure out as I am having the same issue. All I get are 0.0s from my custom indicator. Here's some code.
In ResetStrategy:
if(FGDIHandle == -1)
{
char fgdiInputs[1000];
sprintf(fgdiInputs, "%d;%d;%f;%f;", FGDIPeriod, FGDIPriceType, FGDIRandomLine, FGDIStdDevs);
FGDIHandle = CreateIndicator(Currency, Timeframe, "FGDI", fgdiInputs);
}
In GetSingleTick:
double fgdiLower = GetIndicatorValue(FGDIHandle, Shift, 2);
double test = GetIndicatorValue(FGDIHandle, Shift, 0);
double test1= GetIndicatorValue(FGDIHandle, 0, 2);
double test2 = GetIndicatorValue(FGDIHandle, 0, 0);
The indicator has 3 visible buffers and it prints fine in history mode attached to a chart. I am trying to get the last index/bar value of the third buffer (index 2). As a test I added the above calls to try to retrieve the 0-index value from buffer index 0 and 2, but no luck. I keep getting 0.0 on every bar...
Any ideas? And yes, FGDIHandle is valid and the journal shows that my indicator was created with the proper inputs.
EDIT: I should add that I can retrieve valid values from a built in indicator "ZigZag". |
Ok, I figured out my problem. Wanted to let anyone else reading this know. My custom indicator used an Enum type input and I was passing in the int value from my strategy. You have to pass in the string label of the option value... |
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