How to back test Global Variables?

[Forex Trader]

in my indicator:
GlobalVariableSet(Symbol()+"GlobalVariableFromIndicator",Array[i]);

in my expert:
mydata=GlobalVariableGet(Symbol()+"GlobalVariableFromIndicator");

If I use the above method to get data from my indicator, will I be able to back test it? I seem to only get the current value of the Global Variable rather than the ones from the array for historical data.

Thanks,
Dan

[Forex Trader]

Use IsTesting function and set your global variable name according with its return. For example

string glob_var_name=Symbol()+"GlobalVariableFromIndicator"+IsTesting();