Reference variable Historically

[mcxr7]

Hi, I am writing a strategy and want to reference a variable that I am calculating historically.

For Example:
int variable1 = {MyCalculation}

Strategy Entry
if (
variable1[0] > variable1[1]
)
EnterLong....

I am not sure if this is the best way of doing it, or if in fact it can be done.
Thanks

[NinjaTrader_Bertrand]

You would need to work with a DataSeries object to be able to reference historical values, an intSeries in your case here - http://www.ninjatrader.com/support/h...ries_class.htm