You enhance the accumulation context with a Set of those colours where the size drops below 5. Once you encounter a low one you add it to the set, clear the Map entry and block further additions by testing the set.
-W

On 11 August 2011 15:55, wendy <w.mungovan@yahoo.com> wrote:
Right. But we don't want to match if the size dropped below 5 during the last
20 m.

so if the size for BLUE are:

Time 0 5 10 15 20 25 30 35 40 45 50
Size  5 6 7 6 6 6 6 6 6 4  6

at times 25,30,35,40 we would want to trigger but not at 0, 45 or 50.

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