Its really slow but what you can do is something like the following:
select count(a.*), b.* from foo.bar a,
(
select price from foo.bar order by time asc limit 1
union
select price from foo.bar order by time desc limit 1
) as b
group by b.price
... just do the "wheres" as you need ...
Chris
PS its untested maybe there are some syntax miss-spells
--
cu
Chris
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