Using DataSeries as input to a function

[Tarkus11]

I extracted this calc of Standard Deviation from iVWAP. The 1st parameter is an array. I have tried to change it to IDataSeries to pass it a DataSeries instead but my indicator comes up blank. Is there a way to pass it a DataSeries rather than have to copy the data to an array first? (I changed the .Count to CurrentBar-1 in my test)

 private double StandardDeviation(ArrayList array, double avg)                
        {
            int x = 0;
            double sd = 0;
            while (x < array.Count)
            {
                sd += (((double)array[x] - avg) * ((double)array[x] - avg));
                x++;
            }
            if (sd > 0)
                sd = System.Math.Sqrt(sd / (array.Count));
            return sd;
        }

[NinjaTrader_Brett]

Hello,

Thanks for your forum post.

This is how SMA method does it, cant think of any reason it shouldn't work for you.

public SMA SMA(Data.IDataSeries input, int period)
{

}

Let me know if I can be of further assistance.

[Tarkus11]

Hello,

Thanks for your forum post.

This is how SMA method does it, cant think of any reason it shouldn't work for you.

public SMA SMA(Data.IDataSeries input, int period)
{

}

Let me know if I can be of further assistance.

It doesn't work. I just went back to using an array.

[NinjaTrader_Brett]

Hello,

I discussed this with Bertrand and looks like you need to create a separate indicator to house this. As they all provide iDataSeries interface by default. This needs to be whithen the confines of a separate indicator to allow you to do this. So you would have an indicator that just operates as a function/method if you wanted to further persue this.

Let me know if I can be of further assistance.