Also 10.7% down did I miss something? and this is even worse, it means that the diff takes longer to go down than to go up.
FAIL.
Let's use an EXTREME example.
Say we want to allow a maximum 100% jump upwards?
DIFF SERIES UP: 1, 2, 4, 8, 16... FOR A 100% JUMP UP we MULTIPLY (not add) by 2.00x (otherwise there's no SYMMETRY and favors downward drop which rewards big dump miners at the expense of loyal small miners).
What if we want to balance the downward motion?
100% SERIES DOWN: 16, 0, 0, 0... HOUSTON WE HAVE A PROBLEM!
IT SHOULD BE 50%: 16, 8, 4, 2, 1.
In the case of 12% -> 112/100 max up, 100/112 max down. 12% up, 10.7% down.