Topband: what good are a & k indexes ?

[DF2PY]

hello gang !
last 3 days the numbers fell down to  4 and 3 ,all that came thru was Tom 
-W8JI,no one else made it,that surprised me.Today the numbers are much
higher 15 
and 3  and all in a sudden N7JW  comes thru.I know that propagation cant be 
directly derived from these numbers,but isnt there anything else that produces 
better forecast ?
73 de df2py



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