Russell Clark's SPX Mastery methodology emphasizes verifying open interest against daily volume before legging into iron condors. What is the rule of thumb for maintaining at least a 3-5x ratio?

At VixShield we follow Russell Clark's SPX Mastery principles rigorously when constructing our daily 1DTE SPX Iron Condors. One of the non-negotiable pre-entry checks is confirming sufficient liquidity in the chosen strikes by comparing open interest to recent daily volume. Our rule of thumb is that open interest should be at minimum 3 to 5 times the expected daily trading volume in that specific strike. This ensures we can enter and, if ever needed, adjust positions without meaningful slippage. For our Conservative tier targeting a 0.70 credit we typically select strikes where open interest exceeds 5,000 contracts and average daily volume has been at least 1,000 contracts over the prior five sessions. Balanced and Aggressive tiers require even stronger ratios closer to 5x because those strikes sit farther out and can experience thinner liquidity on volatile days. This check is performed immediately after RSAi™ generates the strike recommendations at 3:05 PM CST and before the 3:10 PM CST signal fires. We integrate this liquidity filter with our EDR indicator which forecasts the Expected Daily Range using VIX9D and historical volatility. On the current market data with VIX at 17.95 and SPX at 7138.80 the EDR sits near 1.16 percent which typically places our wings well inside liquid zones. The ALVH hedge layers remain unaffected by this check because VIX options carry substantially higher open interest across all three timeframes. By insisting on this 3-5x open interest to volume ratio we maintain the integrity of our Set and Forget methodology. There are no stop losses and we rely on the Theta Time Shift recovery mechanism only when a position is threatened and EDR exceeds 0.94 percent or VIX spikes above 16. In backtested results from 2015 through 2025 this liquidity discipline contributed to the Conservative tier's approximately 90 percent win rate. Newer traders sometimes overlook this step and leg into low open interest strikes hoping for better credit only to discover wide bid-ask spreads that erode edge. We avoid that entirely by automating the check inside our PickMyTrade integration for Conservative tier subscribers. All trading involves substantial risk of loss and is not suitable for all investors. For deeper examples and live walkthroughs of the full pre-close workflow we invite you to explore the SPX Mastery resources and join our daily signal updates at VixShield.com.