Lookup Bars Question

[clubfoot]

I was just curious if anyone might know how I could look back in the last say 50 bars from whatever current price where the 3 is on my chart Here's a chart, I need to get the value for #3 level.

How would or could you do it? Thanks!!

https://gyazo.com/465aaf1fda020e0b1051f9a118c5efbd

[clubfoot]

The easiest way I can think to say it would be ...

Show me the last 3 instances of a price change from current bar's value and then setting that value on the last one to whatever I want to make it usable.

Any ideas?

[NinjaTrader_JessicaP]

Hello clubfoot, and thank you for your question.

For this kind of strategy, you need some kind of threshold you can cross to mark off sections. One popular threshold is an SMA (simple moving average). Your threshold can be either a single value, or a DataSeries.

However you define your threshold, you could collect crossover indices in a System.Collections.Generic.List object like this :

First remember to initialize like this :

[FONT=Courier New]private System.Collections.Generic.List<int> myList;

protected override void Initialize()
{
    myList = new System.Collections.Generic.List<int>();[/FONT]

Then we use it like this :

[FONT=Courier New]if (CrossAbove(Close, threshold, lookbackPeriod) || CrossBelow(Close, threshold, lookbackPeriod))
{
    myList.Add(CurrentBar);
}[/FONT]

You would then be able to retrieve the index of the bar 50 before the 3rd most recent crossover like this :

[FONT=Courier New]int oldBar = CurrentBar - myList[2] + 50;[/FONT]

Here is some publicly available MSDN documentation on System.Collections.Generic.List

https://msdn.microsoft.com/en-us/library/6sh2ey19.aspx

And here is some documentation on CrossAbove . CrossBelow has a similar method signature.

http://ninjatrader.com/support/helpGuides/nt7/crossabove.htm

Finally, here is some documentation on CurrentBar .

http://ninjatrader.com/support/helpGuides/nt7/currentbar.htm

Please let us know if there are any other ways we can help.

[clubfoot]

Thank you Jessica, that did it!