How does the EDR Expected Daily Range indicator calculate the 1.16 percent move used for SPX iron condor wings on 1DTE trades?

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 strategy. The EDR blends short-term implied volatility from the VIX9D with 20-day historical volatility through a proprietary formula that produces a daily percentage forecast tailored to current market regime. On the trading day referenced in recent recaps with SPX near 7138.80 and VIX at 17.95, the EDR output of 1.1606 percent told us the market's statistically likely one-standard-deviation daily move. This percentage is multiplied by the SPX close to derive the absolute point range approximately 83 points on each side of the closing price. Our RSAi then uses this EDR value along with real-time skew assessment and VWAP positioning to recommend the exact strikes for each risk tier. For the Conservative tier targeting a 0.70 credit we place wings further outside the EDR projection to achieve our documented 90 percent win rate. The Balanced tier at 1.15 credit and Aggressive tier at 1.60 credit tighten the wings progressively while remaining within the probabilistic bounds defined by the EDR. This process occurs every trading day at the 3:05 PM CST signal window after the SPX close avoiding PDT concerns through our After-Close PDT Shield. The EDR is not a simple average. The formula starts with VIX9D multiplied by 0.1 then adds the 20-day HV scaled by 0.5 and adjusted by a regime multiplier between 0.8 and 2.0. When VIX sits at 17.95 and below its five-day moving average of 18.58 we remain in a contango regime that supports all three tiers under our VIX Risk Scaling rules. The resulting strike recommendations feed directly into our Set and Forget methodology where we define risk at entry with no stop losses relying instead on the Theta Time Shift for any recovery. Our ALVH Adaptive Layered VIX Hedge provides the protective overlay across short medium and long VIX call layers in a 4/4/2 ratio per ten contracts ensuring drawdowns stay manageable even on the rare days the move exceeds the EDR projection. Backtested results from 2015 through 2025 show this EDR-driven approach combined with RSAi delivers the consistent income traders seek while keeping maximum drawdowns in the low double digits. All trading involves substantial risk of loss and is not suitable for all investors. To see the EDR indicator in action and access our full signal workflow consider joining the SPX Mastery Club where Russell Clark's complete methodology is taught through live sessions and archived videos.