The description below was taken from USAG Web Site.
The Xcel Program is designed to offer a broad-based, affordable competitive experience outside the traditional Jr. Olympic Program to attract and retain a diverse group of athletes. The program gives an opportunity for:
Athletes will compete within the following levels:
Bronze: This is the most basic Xcel level. It is approximately equivalent to USAG level 1,2 or 3. Generally, kids will need a back hip circle on bars and either a handstand, cartwheel, or back walkover on beam. While a back handspring on floor is not explicitly required for routines, it is a very important developmental skill and for this reason we will generally put this skill into a gymnasts routine as soon as she is ready to compete it. The vault is a handstand flatback on a large mat (or stack of mats).
Silver: Approximately level 2 to 5. Gymnasts must have at least two tumbling passes on floor. A kip is not required on bars, though it
is developmentally a very important skill, and therefore the plan is to have girls compete this skill as soon as they are ready. The vault for this
level is a handspring flatback over the vault table (landing on mats stacked to around table height).
Gold: Approximately level 5. Challenges include a kip and squat-on on bars, a salto on floor, and a front handspring on vault. Beam has a bit more room for variation, but generally speaking, girls will use two of the following three skills: a 2-second handstand, a cartwheel, and a back walkover.
Platinum: Approximately level 6, with room allowed for more challenging routines. There is some level of multiple-choice in routine construction
at this level, so which skills will be most challenging depends on the gymnast and on the way the routines are constructed. For girls to move past
level 5 & 6 (or past silver in Region 3′s Xcel system), they must compete at least one level 5 meet and achieve certain all-around score to qualify
to move up. In order to move to level 7, gymnasts must also qualify out of level 6.