[amibroker] Selecting the lowest / highest from 3 or more arrays

[bulletdodgerkungfu]

Hello,

I was wondering if there is a AFL function (or creative use of one) which will 
allow the selection of the lowest / highest values from 3 or more arrays.  
("MIN" only does 2 of them).

eg:
array1 = 10;
array2 = 20;
array3 = -50;

with the desiredoutput = -50.

Thanks and regards

James