MetaStock Trend Filter

This is my most recent trend filter I've been reviewing, its about as simple as they come and basic to read:

ColA
3 month trend with min 10% increase from 3 month close
(C>(Ref(C,-60))AND
C>(Ref(C,-40))AND
C>(Ref(C,-30))AND
C>(Ref(C,-20)))AND
C>(Ref(C,-60)*1.1)

ColB
Trend check - Stock hasn't closed below the close 20 period ago, for the last 20 periods
BarsSince(C<(Ref(C,-20)))

Filter
(colD AND colE)
AND colE>20