Math.abs driving me crazy

Desktop SDK - Strategies
1

I have an oscillator, and I want to add the absolute oscillator values for the last ten bars.

So I have a variable intOsc and a series seriesOsc.

intOsc = Math.Abs(myOscillator[0])
seriesOsc[0] = intOsc (I’ve tried seriesOsc[0] = Math.Abs(intOsc) also)
sumOsc = SUM(seriesOsc,10)
When I add the last 10 bars with the above line, I get negative numbers!!

How can that be?

2

Is Math.abs() correct? Or is it Math.Abs()?

3

It is Math.Abs(), which is what is in my code. I wrote it incorrectly here.

Thanks.

4

Wait. So did you write Math.ABS() instead of using Math.Abs() and it’s not working?

Have you tried using print statements to see what is going on?

I put in:
int test = -200;
int abstest = Math.Abs(test);
Print("test: " + test);
Print("abstest: " + abstest);

and that works fine.

Output:
test: -200
abstest: 200

5

Here is an example:
image
Osc[0] is a positive number and prints correctly. Osc[1] is actually a negative number, so it is printing correctly as Math.Abs() has correctly made it a positive number.
Osc_Sum = SUM(seriesOsc, 2) should be adding Osc[1] and Osc[0] and coming up with a positive number, .0188327. It is not. First of all if the series is storing positive numbers, how is the sum a negative number, and not a correct number at that.

Thanks for your reply!

6

Figured it out.

Osc_Sum = SUM(seriesOsc,2)[0]

7

Ok. I was gonna say I think you weren’t using SUM correctly. If you have trouble with that, you can always google ninjatrader + whatever you are C# code you’re trying to use, in this case “Ninjatrader Sum” gave me their page of how to use it and what overloads it takes.

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