need to add past 7 dates

I have this working so far

order#   Current date     Non Current

123       102214

234                                   101214

Now they want a new col for past 7

so we would have this:

order#   Current date     Non Current      past 7

123       102214

234                                   101214

456                                                        102014

for done so far

formula to get the current date: (CD is the alpha date field)

If  {@dd} = currentdate then

{OEORH1.OHORDD}

then i display this in the col for current

all the others i display in the non current

how to check if past 7

how to check if @dd is in currentdate - 7  

syntax wise this is not correct.