A mobile communications system can easily set the optimum threshold for use in selecting a modulation-coding mode depending on a link condition. According to one embodiment, a method may include dynamically predicting utilization of a web services computing resource that is expected to occur during a given interval of time, and dependent upon the dynamically predicted utilization, setting a price associated with utilization of the web services computing resource occurring during the given interval of time. The square arms and rule are thick thereby providing saw guides.