Formula for bar lookback periods

[erik949]

I have a strategy I am working on and cant get my head to wrap around the math needed for the situation. Here's my problem.

I am evaluating a bunch of functions for enter signal. One of the function is the ADX. What I want to be able to do is evaluate the ADX on a certain period and check the value of X number of bars back to see if a certain value was met. Is some case I want to look back 3 bars in others 13 bars. So I created variables for ADX Period and the # of bars back a wanted to evaluate. The place I am getting stuck is how to write the formula. The ghetto side of me wants to do a bunch of if / else if statements but that requires me to change the code each time to account for the # of bar look backs rather than just change the variable in the strategy.

Is there any help out there for me?

[NinjaTrader_Bertrand]

erik949, it might not be following you fully here but for the lookbacks to check you would have two variables for example that could also be user inputs you would then use in the final condition to check. For repetitive code parts it might be worth exploring the looping commands available in C# -

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