WORKS: =INDEX($C$62:$C$241,MATCH(TRUE,INDEX($C$62:$C$241>0,0,1),0))
=INDEX(ADDRESS(3,M1,4):$C$241,MATCH(TRUE,INDEX(ADDRESS(3,M1,4):$C$241>0,0,1),0))
trying to use cell M1 result as row number for $C$M1:$C$241 in both places
ADDRESS does not work
Solved by G. D. in 23 mins