Here is how I score past 12 month rate of change in M3:

5% increase or more ---- +2
2 to 5% increase ---- +1
2% decrease to 2% increase ---- 0
2% to 5% decrease ---- -1
5% decrease or worse ---- -2

Here is how I score instantaneous rate of change in M3:

5% annualized increase or more ---- +2
2 to 5% annualized increase ---- +1
2% annualized decrease to 2% annualized increase ---- 0
2% to 5% annualized decrease ---- -1
5% annualized decrease or worse ---- -2