I will type what you need to put in your signature line under "my info". The only difference is that I am going to use {} to surround commands, you will use [ ]. Also, I will put a color in there for an example but you can change your colors to whatever you want. Start with the most weight you want to lose in the next six months and go down from there. Example based on 25lbs to lose:
{b} {color=red} 25****20****15****10****5****GOAL! {/color} {/b}
When you lose say, 3 lbs and want to put your different color asterisk there, it would look like this:
{b} {color=red} 25**{/color} {color=blue}*{/color} {color=red}*20****15****10****5****GOAL! {/color} {/b}
don't forget to change your brackets to [ ]. It's not as hard as it may look. All you are doing is telling the program when to turn a color on an off.
Now, for the graphic.....
{b} {color=red} 25**{img}url{/img}*20****15****10****5****GOAL! {/color} {/b}
You don't change colors because the image from the url will be your exclamation point, smiley or whatever....
If you want to do 1/2 lb increments, all I did was alternate an asterisk with a dash *-*-*- You could use whatever symbol combo you want.
Holler if you need more help!
Here are some graphics for you to use:
purple exclamation point
http://www.boomspeed.com/preacherswif/purplex.gif
yellow exclamation point
http://www.boomspeed.com/preacherswif/yellowx.gif
red checkmark
http://www.boomspeed.com/preacherswif/checkmark.gif
smiley
http://www.boomspeed.com/preacherswif/smiley.gif
star
http://www.boomspeed.com/preacherswif/star.gif