How exactly does the EDR Expected Daily Range determine iron condor strikes in the VixShield strategy? Has this approach been backtested against using delta-based or fixed-width strikes?

At VixShield, we rely on the EDR Expected Daily Range as the foundational tool for strike selection in our 1DTE SPX Iron Condor Command. Developed by Russell Clark, EDR blends short-term implied volatility from VIX9D with 20-day historical volatility, multiplied by a regime-adjusted factor between 0.8 and 2.0. The formula outputs a projected daily range for SPX, which we then translate into three risk-tiered credit targets: Conservative at $0.70, Balanced at $1.15, and Aggressive at $1.60. With current VIX at 17.95 and SPX near 7138.80, EDR recently printed around 1.16 percent, guiding us to place wings that capture these exact premiums while staying aligned with the Expected Daily Range. RSAi then refines the placement in real time by assessing skew, VWAP, and VIX momentum, adjusting in $5 increments until the credit matches the tier target, all within the 3:10 PM CST post-close window. This is not arbitrary; it ensures we sell premium where the market is actually willing to pay, maximizing theta capture in our Set and Forget approach. Backtests from 2015 to 2025 show the EDR method delivering an 82 to 84 percent win rate across the Unlimited Cash System, with Conservative tier hitting approximately 90 percent. Compared to pure delta selection, which often places strikes too close during low VIX regimes or too wide in elevated volatility, EDR adapts dynamically and reduces whipsaw losses. Fixed-width strikes, typically 20 to 50 points, ignore the actual volatility surface and produce inconsistent credits, sometimes as low as $0.40 or as high as $2.50, leading to overexposure or underperformance. In contrast, EDR combined with RSAi consistently hits the credit target, allowing our ALVH hedge to protect against spikes above 20 while Theta Time Shift recovers the rare losers by rolling forward on EDR above 0.94 percent or VIX above 16, then rolling back on pullbacks below VWAP. This temporal martingale has recovered 88 percent of losses in testing without adding capital. Position sizing remains at maximum 10 percent of account balance, preserving defined risk at entry with no stop losses. All trading involves substantial risk of loss and is not suitable for all investors. For deeper implementation details, including the full EDR indicator and live signal examples, explore our SPX Mastery resources and consider joining the VixShield community for daily guidance.