Enhanced the blue line to be dynamic according to time and VIX.
Blue line is meant to act as a guiding line for entry, so I design it to simulate options time decay and added in VIX change throughout the day.
Usage example is, when SPX moves near/beyond the blue line. It acts as one of the indicator for entry.
e.g. if SPX moves up and touches the blue line, with other indicators supporting, is a potential entry for selling bear call spread.