  Metals interacting via short-range antiferromagnetic fluctuations are
unstable to sign-changing superconductivity at low temperatures. For the
cuprates, this leading instability leads to the well known $d-$wave
superconducting state. However, there is also a secondary instability to an
incommensurate charge density wave, with a predominantly $d-$wave form factor,
arising from the same antiferromagnetic fluctuations. Recent experiments in the
pseudogap regime of the hole-doped cuprates have found strong evidence for such
a charge density wave order and, in particular, the predicted $d-$wave form
factor. However, the observed wavevector of the charge order differs from the
leading instability in Hartree-Fock theory, and is that of a subleading
instability. In this paper, we examine the feedback of superconducting
fluctuations on these different charge-density wave states, and find that over
at least a small temperature window, they prefer the experimentally observed
wavevector.
