How exactly does the EDR indicator calculate the projected daily range used for rolling 1DTE short calls 10 to 20 minutes before the close in the VixShield strategy?

At VixShield we rely on the EDR Expected Daily Range indicator developed by Russell Clark as the cornerstone of our 1DTE SPX Iron Condor Command and Big Top Temporal Theta Cash Press strategies. The EDR blends short-term implied volatility from the VIX9D with 20-day historical volatility to forecast the likely one-day price excursion for the S&P 500. Its core formula is EDR equals VIX9D multiplied by 0.1 plus HV multiplied by 0.5 then scaled by a regime-based multiplier between 0.8 and 2.0. This produces three risk-tuned strike recommendations labeled High Medium and Low that directly inform where we place our short calls and short puts each day. For our daily 1DTE Iron Condors the EDR output at 3:05 PM CST is fed into RSAi Rapid Skew AI which layers in current options skew VWAP positioning and the last four hours of VIX momentum. RSAi then adjusts the wings in five-dollar increments until the net credit matches our tier targets Conservative at 0.70 Balanced at 1.15 or Aggressive at 1.60. This process completes in roughly 253 milliseconds and ensures we capture the exact premium the market is willing to pay rather than forcing statistically probable but low-credit wings. When rolling short calls in the Big Top Temporal Theta Cash Press 10 to 20 minutes before the close the EDR again becomes the decision engine. We first check the Contango Indicator. If it reads green meaning VIX futures are in normal upward slope we roll the short 1DTE call to a new strike suggested by the current EDR projection. The goal is to harvest additional premium while keeping delta below 0.18 and gamma under 0.05. Should the EDR exceed 0.94 percent or spot VIX rise above 16 the Temporal Theta Martingale triggers a forward roll of any threatened Iron Condor positions out to 1-7 DTE to capture vega expansion. We then monitor for an EDR contraction below 0.94 percent combined with price trading below VWAP to roll the position back to 0-2 DTE completing the Theta Time Shift cycle. Backtests from 2015 to 2025 show this temporal martingale approach recovered 88 percent of losses without adding capital. Our ALVH Adaptive Layered VIX Hedge runs in parallel across three timeframes short 30 DTE medium 110 DTE and long 220 DTE VIX calls in a 4/4/2 ratio per 10 Iron Condor contracts. This first-of-its-kind hedge reduces drawdowns by 35 to 40 percent during volatility spikes at an annual cost of only 1 to 2 percent of account value. Position sizing remains conservative at a maximum 10 percent of account balance per trade and we follow strict VIX Risk Scaling rules: all tiers are available below 15 aggressive is blocked between 15 and 20 and we hold all Iron Condor trades above 20 while keeping ALVH fully active. The entire system is designed as Set and Forget with no stop losses relying instead on the built-in Theta Time Shift for zero-loss recovery. All trading involves substantial risk of loss and is not suitable for all investors. To see the EDR indicator in action and access the complete SPX Mastery methodology visit VixShield.com and consider joining the SPX Mastery Club for live sessions indicator access and moderator guidance.