[amibroker] Pass value of variable from AFL to AFL

["Graham Johnson" <grahamj@xxxxxxxxxxxxxxxxxxxxx>]

For the sake of code re-use, I wish to have CBT code in its own AFL and 
access it using SetCustomBacktestProc("<filename>");

That works fine except that in the Main.afl there is a variable set for 
Max Open Positions and I want to pass that value to CBT.afl for 
inclusion in the backtest report using AddCustomMetric.

Tried using Global but that didn't get a result - CBT.afl didn't 
recognise the variable name.

I presume that from Main.afl I could write the value to a file and then 
retrieve the file in CBT.afl.  Gets a bit messy when wanting to pass 
the values of several variables.

Is there a better way, please?

Graham



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