Here is a mean reversion system which targets the top momentum stocks in the NDX. Essentially, a combination of a momentum system and a mean reversion system with daily entry/exits. The idea came from: https://www.systematic-investors.com/strategy-session-ndx-momentum/ which had a CAGR of 35% and 23.5% MaxDD.
My attempt:
Compared to a regular monthly momo NDX system, very highly correlated (not surprisingly):
And a version for the Russ1000: