改来改去还是显示invalid syntax怎么办呜呜呜

forvalues i=1/`maxnumber'{
*每只股票
display `i'
quietly egen time=group(month) if id==`i'
quietly sum time if id==`i'
quietly gen nofm=.
forvalues j=1/`r(max)'{
*每个月
scalar a=0
forvalues k=0/`r(max)'+`j'{
*每个月向后循环
if id==`i'&time==`j'+`k'&`in_r'>=0{
local a=`a'+1
}
if id==`i'&time==`j'+`k'&`in_r'<0{
break
}
}
quietly replace nofm=`a'
drop a
}
quietly sum nofm
quietly replace Nofm=`r(max)'
quietly drop time nofm
}
keep Nofm id stkcd
duplicates drop id stkcd