Abstract: In electronic trading venues, there may be orders for which the full information is not publicly displayed. For example, the full quantity of an order available for trading or the most aggressive price at which an order can be traded may not be made public. A system and method are disclosed that facilitates trading based on this non-public information. A first order associated with a financial instrument is placed at a venue to probe for non-public information related to the financial instrument. The results of the probe may then be used to place a second order at the venue that takes advantage of any discovered non-public information.

Abstract: An ear ventilation tube adapted for insertion in the tympanic membrane of the ear for communicating fluid between the middle and outer ear formed by two conical body portions joined at their narrow ends with an opening through the center of the conical flanges for the passage of fluid. The outer surface of the ventilation tube forms a V-shape with the restricted portion near the center of the ventilation tube. The inner surface of the ventilation tube along the opening has a middle restricted portion and two end portions of significantly larger size in order to enhance the flow of fluid through the opening.