Using a secondary instrument as a filtering criteria possible?

[MickeyHR]

I would like to use two instruments to trigger a signal.

Like this:

If the main instrument short MA is above the main instrument longer MA and secondary instrument short MA is above longer MA create a signal

if
			(
				SMA(5)[0] > SMA(10)[0] 
				[B]&&
				"SMA(5)[0] > SMA(5)[0]"[/B]
			)
			{
				DrawArrowUp("arrow"+CurrentBar, true, 0, Low[0]-ATR(10)[0]*2, Color.Green);

			}

where "SMA(5)[0] > SMA(5)[0]" would be based on a secondary instrument like ^DJIA (Dow Jones Industrial Average).

Is this possible? Tried to look around, but couldn't quite find a post about this kind of a coding. So, any hints appreciated Thank you!

[NinjaTrader_Bertrand]

MickeyHR, yes that would be possible in a MultiSeries script. You can Add() in another instrument in your script's Initialize() method -

http://www.ninjatrader.com/support/helpGuides/nt7/add3.htm

So lets say you want to add in a 5 minute DJIA index series -

Add("^DJIA", PeriodType.Minute, 5);

You can then access this symbol via passing the correct BarsArray to your second SMA statement.

&& SMA(BarsArray[1], 5)[0] > SMA(BarsArray[1], 10)[0]

You want then to also add in a BarsInProgress check to filter for which bars object OnBarUpdate() call this condition should be evaluated - http://www.ninjatrader.com/support/h...inprogress.htm