a = 0
SMAlist = []
for each_item in y:
    if a > 4 and a < ((len(y))-1): # finding my averages begin at 6th item
        b = (y[a-5:a+1]) # this line doesn't work for the last item in y
        SMAsix = round((sum(b)/6),2)
        SMAlist.append(SMAsix)
    if a > ((len(y))-2): # this line seems unnecessary. How can I avoid it?
        b = (y[-6:-1]+[y[a]]) # Should I just use negative values in general?
        SMAsix = round((sum(b)/6),2)
        SMAlist.append(SMAsix)
    a = a+1