Help understanding logic

[lookOutBelow]

I'm a self admitted hacker when it comes to writing strategies. So, when the author of an indicator helped me with something, he had me do something that went over my head. I was wondering if someone could explain the logic so that I can use it in the future?

In the initialize section, I have:

zzBAR    = ZigZagUTC_TL_BarCount_Fibs_v5_1(3,false,false,false,false,false,false,false,1,true,Color.Green);

In on bar update, I have:

double z = zzBAR[0];

And if I want to use something from that, I can simply do a "zzBAR.lastlo" (Or whatever value I'm pulling from it).

But my question is, how can I pull a value from a bar other than [0]? Like [1]. Doing something like zzBAR.lastlo[1] obviously won't work. Do I have to make a zzLASTBAR with double x = zzLASTBAR[1]; ? Or is there another cleaner way?


edit::: Forgot to mention there is the following in the variables:

private         ZigZagUTC_TL_BarCount_Fibs_v5_1 zzBAR;

Thanks

[NinjaTrader_RyanM1]

Hello lookOutBelow,

You should be able to use:

double x = zzBAR.lastlo[1];

An example of accessing prior values of a standard multiplot indicator is:
double x = RSI(14, 3).Avg[1];

[lookOutBelow]

Ryan,

When I do that, I get an error: Cannot apply indexing with [] to an expression of type 'method group'.

For a reason I don't understand, it seems it wants the indicator parameters. Shouldn't it already be defined in zzBAR?

[NinjaTrader_RyanM1]

Without seeing exactly how it's coded, it's difficult to know what NT is expecting for syntax.

Continuing the RSI example:
private RSI myRSI; //variable declaration

myRSI = RSI(14, 3); //OnStartup()

double x = myRSI.Avg[1]; //Accessing prior Avg plot value in OnBarUpdate()