MAX with lookback period

[GeorgeW]

Hello,
I am going around in circles on a piece of coding that I think should be quite easy. I have a plot, and I want to look back 20 bars at the changes in value from bar 1 to bar 0 and if the current change is higher, take some action. I am not sure about the Input part of the MAX coding.

if (Values[1][0]-Values[1][1] > MAX(?, 20)[0])

It needs to be > than Values[1][0]-Values[1][1] over the previous 20 bars, but the inputs part of the code where I have the ? will not accept that as an argument.

Any help would be appreciated.

Thanks!

[koganam]

Hello,
I am going around in circles on a piece of coding that I think should be quite easy. I have a plot, and I want to look back 20 bars at the changes in value from bar 1 to bar 0 and if the current change is higher, take some action. I am not sure about the Input part of the MAX coding.

if (Values[1][0]-Values[1][1] > MAX(?, 20)[0])

It needs to be > than Values[1][0]-Values[1][1] over the previous 20 bars, but the inputs part of the code where I have the ? will not accept that as an argument.

Any help would be appreciated.

Thanks!

The "?" part of what you have written is to be a Series<T>, so create a Series<double> to hold the difference values, then feed that Series to the MAX() method.

ref: http://ninjatrader.com/support/helpG...us/seriest.htm

The last example on that page is a mirror of what you are seeking. You just need to look for a different difference from the one in the example.

[GeorgeW]

Thanks Koganam,
I went for a walk to clear my head and figured out I needed to use Series<T> 5 mins into my walk. I'll have to remember to do that more often when I'm stuck. I've done it and my calculations now work.