The mean rules.

If you're going to play the game, you have to agree on the rules up front, right?

OK, here's mine:  I reach goal when the average of 5 consecutive morning weigh-ins is 108.0 lbs or below.

Here are my last five weigh-ins including this morning:

109.0

110.2

111.4

110.0

108.2

Mean: 109.8