AFL (Beginner Question)

[520001085531-0001@xxxx]

Hi, could someone please convert the 
following
formula to AFL (Boll is BollingerBands):
 
     (BollLower <= 
lowest_BollLower[4] or BollLower[1] <= lowest_BollLower[4]) and 
(close     <= lowest_close[4]     or 
close[1]     <= lowest_close[4]) 
 
 
Explanation:
  close [1] means yesterday
  lowest_close[4] means lowest close of the past 4 
days upto (incl.) yesterday
 
Thanks