Volatility auction

Gives when the price of an order passes the static range or the dynamic range, whether for your lower limit or superior, in this case, the contracting interrupts and the value passes automatically to a situation of auction of volatibilidad, that have a duration of 5 minutes mñas a closing random of 30 second during which, at any time, and without prior notice, is over the auction and happens the allocation of titles (crossroad of operations to the price of calculated balance).