metastock formula

Sir
Pl. help to get metastock formula for condition given below:
1.Open = Low and Open > Previous Close .

Not very sure, but u can try it. There may be easier alternate but with my limited knowledge this is what comes to my mind.

a:=Ref((C),-1);
O=LOW AND O>a

O=l;
and
o<ref(c,-1);

Guys, anyone having any link of metastock progamming guide

O=L AND O > Ref(C,-1)

Best Wishes