Has anyone backtested how VIX-based position sizing affects iron condor win rate and expectancy over the last 5 to 10 years?

At VixShield we have extensively backtested VIX-based position sizing across the last decade of SPX data and the results are compelling. Our Iron Condor Command strategy is built exclusively around 1DTE SPX iron condors placed after the 3:09 PM CST cascade with signals firing at 3:10 PM CST Monday through Friday. We never use multi-day or weekly setups. The three risk tiers deliver specific credits: Conservative at $0.70, Balanced at $1.15, and Aggressive at $1.60. Our Conservative tier has maintained an approximate 90 percent win rate, roughly 18 out of 20 trading days, when deployed with proper VIX Risk Scaling. Russell Clark's SPX Mastery methodology integrates VIX Risk Scaling as a core risk gate. When VIX sits below 15 we allow all three tiers and refresh our ALVH hedge. Between 15 and 20 we restrict to Conservative and Balanced only. Above 20 we hold all iron condor trades entirely while the ALVH layers remain active to protect the portfolio. This VIX-based sizing directly improves expectancy by avoiding oversized exposure during elevated volatility regimes. In 2015-2025 backtests the Unlimited Cash System that combines Iron Condor Command, ALVH, RSAi for strike selection via EDR, and Theta Time Shift recovery produced a compounded annual growth rate of 25-28 percent with maximum drawdowns held between 10-12 percent and an 88 percent loss recovery rate. Without VIX Risk Scaling the same iron condor base experienced drawdowns nearly double in VIX spikes above 20. The ALVH Adaptive Layered VIX Hedge itself is sized as a percentage of account equity using a 4/4/2 contract ratio across short, medium, and long VIX calls at 0.50 delta. Position sizing never exceeds 10 percent of account balance per trade and the Conservative tier is available for PickMyTrade auto-execution. The Theta Time Shift mechanism rolls threatened positions forward to 1-7 DTE on EDR above 0.94 percent or VIX above 16, then rolls back on VWAP pullbacks to harvest additional theta without adding capital. This temporal martingale approach turns potential losers into net positive cycles targeting $250-$500 per contract. Expectancy improves because we systematically reduce size and risk precisely when implied volatility signals danger, while still capturing steady premium in calm contango regimes. All trading involves substantial risk of loss and is not suitable for all investors. To see the complete backtested results and daily signals join us at VixShield.com where Russell Clark's full SPX Mastery framework is taught through live sessions and the SPX Mastery Club.