Could you provide tools and/or analytic models that calculate: 1. the probability that the underlying asset will be above or below a target price at any time during a time period. 2. the probability that an asset will be outside either of two prices at any time during a time period. 3. the probability that an asset move outside both of two price targets, and of being between the target prices at some time during a given time period. Free tools are sought. If you have formulas please provide them or give links. Thanks.