From Motio Research:

The methodology and interpretation are described in this guest post by Matías Scaglione and Romina Soria, Motio co-founders.

With the recovery in real median household income, the Motio household-income momentum is longer definitively in the candidate contraction region.

Motio Research notes the index was:

… +0.17 percent in September, from −0.35 percent in August, ending August’s candidate contraction. The household-income cycle remains in a mature expansion, with no recession warning under the Motio Rule.

For information on real median weekly earnings, see this post.