1.To have thig and bicep motion trail
2.Refresh history of your account every few months.

1. Biceps don't move as fast or travel as much distance as normal trails. Making such an item is a little useless. One thing you can do however is make a flame for the bicep which leaves a trail of particles slightly similar to what you are requesting.
2. Your account updates itself either instantaneously (transaction history, post count, qi, rank, etc) or within a day (achievements).