# Account 'elasticity'

N.B: this concept may be adequately captured by the zero crossing frequency (see [circularity of trade](/CMlnVwUjR6-EPA4jHyqsqw)).

A key metric for the viability of an account is surely connected with its measured tendency to return to some desirable (or at least acceptable) [Balance Vector](/RK0pk9ncTfOugxtb22ZiyA).