Abstract: A data processing flow chart control system includes a variable sequence series of independent data processing blocks for receiving input data corresponding to price versus time data for a variable price item and for generating time-related entry and exit signals corresponding to the acquisition and disposition of rights to the variable price item. A data processing sequence control system may be selectively configurable between a closed data processing configuration and an open programming configuration. The data processing sequence control system selectively allows each data processing block to be reconfigured between a data processing configuration and a block reprogramming configuration.