I'm not sure where my red line is as far as weight is concerned.
I am 5'4' and when I was losing I went down to 117 but in the process of progressing with Weight Lifting I am up 3 and sometimes 4 lbs. Hope it's because I am adding muscles!

Even though I weigh myself every day ( I never want to reach my highest ever weight of 153 again or go through those looong 5 months of losing the weight) I am focusing more on how my size 6 pants feel.
As long as they feel "normal" on me, I'm not going to worry about my weight.
I also notice that there is quite a range of weight for people who are my height and who are at goal at higher weights than myself.
I think a huge key for me is exercizing consistently and progressively pushing myself ( honestly though I have very strong will power and am disciplined from years of daily yoga --though I wish I had added the WL sooner-- that sometimes I really think I need to learn to progress more gradually rather than always pushing or going for my max).
The other key for me is clean eating.
I am very consistent with that as well and have recently added more protein like whey protein shakes.
I also found a healthy organic protein bar at Whole Foods. At first I thought it tasted pretty awful but I have actually grown used to it --22 grams of protein--great for an on the run breakfast.
I'm pretty much eating the way I was when I was losing with perhaps 200 or so more cals a day.
I have one " treat" meal a week when my husband and I go out for lunch.
And I'm still easily getting into those pants!!
