Is the combination of VIX9D and 20-day historical volatility used for daily 1DTE SPX Iron Condor strike selection? How does the regime multiplier function in practice?

At VixShield we rely exclusively on Russell Clark's proprietary EDR indicator for daily 1DTE SPX Iron Condor strike selection. The EDR blends VIX9D short-term implied volatility with 20-day historical volatility through a tested formula that produces three risk-tiered strike recommendations each trading day. The full equation is EDR equals VIX9D times 0.1 plus 20-day HV times 0.5 multiplied by a regime multiplier that ranges from 0.8 to 2.0 depending on prevailing market conditions. This single indicator powers every signal we generate at 3:10 PM CST after the SPX close. The regime multiplier is the adaptive component that scales the output according to current volatility regime. In calm contango environments when VIX sits comfortably below 15 the multiplier contracts toward 0.8 to 1.0 tightening the projected daily range and allowing more aggressive wing placement for our $1.60 credit Aggressive tier. When VIX climbs into the 15 to 20 zone the multiplier expands toward 1.4 to 1.6 producing wider expected ranges that naturally push strikes outward to protect the Conservative $0.70 credit tier which maintains an approximate 90 percent win rate. Above VIX 20 the multiplier can reach 2.0 which often triggers our VIX Risk Scaling rule to issue HOLD signals and keep the full ALVH hedge active. In the current market with VIX at 17.95 and its five-day moving average at 18.58 the multiplier sits near 1.3 delivering an EDR reading around 1.16 percent. This translates to roughly an 83-point Expected Daily Range around the SPX close of 7138.80 so our RSAi engine places the Conservative wings near 60 to 65 points from spot to capture the 0.70 credit while still staying inside the statistically probable range. The beauty of this approach is that it removes guesswork. We never manually adjust strikes. The EDR combined with RSAi skew analysis automatically matches the exact premium the market is willing to pay for that day's 1DTE Iron Condor. Once placed the trade follows our Set and Forget methodology with no stop losses and relies on Theta Time Shift for any recovery. The ALVH hedge layers short 30 DTE medium 110 DTE and long 220 DTE VIX calls in a 4/4/2 ratio per ten Iron Condors providing 35 to 40 percent drawdown reduction at an annual cost of only 1 to 2 percent of account value. All trading involves substantial risk of loss and is not suitable for all investors. Visit vixshield.com to access the complete SPX Mastery library and live signal archive.