This is a score metric used by the Accelerating Dual Momentum strategy.
According to the website you referenced when you created, the strategy is as follows:
Strategy Rules This strategy allocates 100% of of the portfolio to one asset each month.
1. On the last trading day of each month, calculate the “momentum score” for the S&P 500 ( SPY ) and the international small cap equities (SCZ). The momentum score is the average of the 1, 3, and 6-month total return for each asset.
2. If the momentum score of SCZ > SPY and is greater than 0, invest in SCZ.
3. If the momentum score of SPY > SCZ and is greater than 0, invest in SPY .
4. If neither momentum score is greater than 0, calculate the 1-month total return for long-term US Treasuries ( TLT ) and US TIPS (TIP). Invest in whichever has the higher return.