CrossAbove Close & Close[0] different results

[un$ane]

Anyone know why these expressions would evaluate differently?

CrossAbove(Close[0], EMA(m_FastPeriod), 1): False
CrossAbove(Close, EMA(m_FastPeriod), 1): True
6/4/2009 6:39:01 PM

[NinjaTrader_Bertrand]

Welcome to our forums, please check this link and try reversing the order when you compare a double and a dataseries in the CrossAbove / CrossBelow - http://www.ninjatrader-support.com/H...rossAbove.html

[un$ane]

Does that mean this method is invalid?

public bool CrossAbove(double value, IDataSeries series2, int lookBackPeriod);

I can't seem to get either one of these to evaluate to True:
CrossAbove(EMA(m_FastPeriod), Close[0], 1);
CrossAbove(Close[0], EMA(m_FastPeriod), 1);

In my strategy I'm using:
CalculateOnBarClose = true;
if (BarsInProgress == 0 && FirstTickOfBar)

Thanks for the reply.

[NinjaTrader_Bertrand]

Please try using then and see if this evaluates to 'true' -

CrossAbove(Close, EMA(m_FastPeriod), 1);

[un$ane]

It does...But I'm curious why the others don't. I'm now questioning my understanding of the concept and/or whether there's a bug.

[NinjaTrader_Bertrand]

If you submit a double, it has no history of values to compare so it would never cross.

[un$ane]

oh...That makes sense!

Kinda weird why those methods exist, but at least I can sleep better tonight

Thxs Bertrand.