How do you determine the floor and ceiling strikes on a fence options strategy to achieve zero net premium cost?

In options trading a fence is a structured position that combines a protective put with a covered call to define both downside floor and upside ceiling while aiming for zero net premium. The goal is to select the long put strike as your floor and the short call strike as your ceiling such that the premium received from selling the call exactly offsets the cost of buying the put. This creates a collar-like structure with no out-of-pocket expense at entry. Strike selection begins with identifying your risk tolerance and the current Expected Daily Range or EDR. Russell Clark's SPX Mastery methodology emphasizes using the EDR indicator which blends short-term implied volatility from VIX9D and historical volatility to project the likely daily price excursion of SPX. For a fence on SPX you would typically target the floor put strike near the lower EDR boundary and the ceiling call strike near the upper EDR boundary adjusted for skew. At current market levels with SPX at 7138.80 and VIX at 17.95 the EDR might project a daily range of approximately 0.9 to 1.2 percent. This translates to potential floor strikes roughly 65 to 85 points below current price and ceiling strikes 65 to 85 points above depending on the exact EDR reading and RSAi skew analysis. RSAi or Rapid Skew AI then fine-tunes these wings in real time by scanning the volatility surface and VWAP to ensure the credit from the short call matches the debit of the long put within a few cents. In VixShield's approach this zero-cost fence often serves as a complementary layer within the broader Unlimited Cash System rather than a standalone trade. It can protect an underlying SPX position or act as a defined-risk overlay around Iron Condor Command placements. The Adaptive Layered VIX Hedge known as ALVH is layered on top using a 4/4/2 ratio of short medium and long-dated VIX calls at 0.50 delta. This adds volatility protection without altering the zero-premium nature of the fence itself. Because VixShield focuses on 1DTE SPX Iron Condors placed at the 3:10 PM CST signal the fence concept is adapted for very short horizons where Theta Time Shift can recover any temporary breaches by rolling threatened positions forward to 1-7 DTE on EDR readings above 0.94 percent or VIX above 16 then rolling back on VWAP pullbacks. This temporal approach has shown 88 percent loss recovery in long-term backtests without requiring additional capital. Position sizing remains conservative with no more than 10 percent of account balance allocated to any single structure. Traders must monitor the Contango Indicator to confirm favorable VIX futures structure before deploying. A common pitfall is setting the floor too tight which raises the put cost and forces the ceiling lower reducing upside participation. Conversely an overly wide floor lowers protection. The RSAi engine mitigates this by iterating strikes in five-point increments until the net premium hits exactly zero. All trading involves substantial risk of loss and is not suitable for all investors. For deeper examples and live signal application visit the VixShield resources and SPX Mastery Club to access the full EDR indicator and daily RSAi outputs.