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I’m about to share something I rarely talk about in detail — the exact mathematical framework that’s failed me exactly once in over 500 trades.
I call it the VIX Rule of 16, and it’s the foundation of how I calculate expected daily moves and position my strikes with incredible accuracy. When I say this method works, I mean it literally delivered 16 winners in a row after the one outlier loss.
Here’s the math behind it, and more importantly, why understanding this calculation can completely transform how you approach daily trading.
The Mathematical Foundation That Changes Everything
The calculation itself is beautifully simple. There are roughly 252 trading days in a year, and the square root of 252 is 15.9 — which we round to 16 for easy mental math.
This is where it gets powerful. You take the current VIX value and divide it by 16 to determine the expected daily move percentage. With a VIX at 22.3, that translates to a potential 1.4% daily move.
But here’s what most traders miss — timing matters. I calculate this in real time before the opening bell because that value typically represents the extreme of the day. This isn’t some random number I pull at market close. It’s a precise measurement that tells me exactly where to set my strike prices.
And the accuracy? This method has failed me only once in 500 trades. Let me tell you about that one day, because what happened next proves why this system works.
The market moved 1.65% on a day when the VIX of 22 should have limited movement to about 1.25%. I was genuinely angry — not because I lost, but because mathematically it made no sense. The market essentially acted like it had a VIX of 27.
I took a manageable loss that day. And then 16 consecutive winners followed, which is exactly what tends to happen after a silly outlier day. One inefficient move often leads to 10, 15 or even 20 days in a row of clean, predictable setups — and that’s where this system shines.
That’s why a big part of trading is simply playing probabilities and putting the math in your favor.
Why Outlier Days Actually Strengthen the System
Here’s what’s fascinating about that loss — it wasn’t a failure of the system. It was proof of exactly how market makers operate.
When the market pushes through an expected low or high, it forces market makers to roll a 0DTE hedge. They’re taking on unexpected heat from order flow and repositioning risk into the next session, which resets the landscape in a very specific way.
Then something predictable happens. After one inefficient day, they typically tighten things up for days and days of indecision and range-bound trading. That’s when premium sellers absolutely dominate because the environment becomes controlled and compressed.
This is why I use the VIX Rule of 16 to establish my strike prices every single day. I’m aiming for strikes that maintain an 85-90% probability of profit, and this calculation gives me exactly that edge.
One important detail — if we gap at the open, I measure the expected move from the opening price rather than the previous close. That keeps the calculation accurate regardless of overnight action.
The beauty of this approach isn’t that it’s perfect — nothing is. The beauty is that it’s mathematically sound, historically proven and creates a systematic edge that compounds over time.
And risk management plays an important role in making the system work. You have to trade smaller and manage your exposure because it’s easier to make simple base-hit trades every day. On the occasional inefficiency day, you can be ready to scale a bit more aggressively in the next couple days when conditions snap back into alignment.
One outlier loss followed by 16 straight wins? That’s the power of understanding how volatility actually translates into price movement.
If you’re positioning trades based on gut feel or guesswork about daily ranges, you’re leaving serious edge on the table. The VIX Rule of 16 removes the guesswork and replaces it with probability-based precision.
I’ll see you in the markets.
Chris Pulver
Chris Pulver Trading
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*This is for informational and educational purposes only. There is inherent risk in trading, so trade at your own risk.
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We develop tools and strategies to the best of our ability, but no one can guarantee the future. There is always a risk of loss when trading. Past performance is not indicative of future results. The trades expressed are from an 11-year backtest on 543 trades. The result was a 97.1% win rate, an average return of 17% (winners and losers), and an average hold time of 11 days. Every “Weekly Windfall” targets roughly $1,000 in income based on $5,000 in risk, and every example is based on that same risk unless otherwise stated (Although you can get started with just a couple of hundred bucks). From 9/30/24 – 2/27/26 on 128 live trades, the win rate is 94%, 16% average return (winners and losers) with an average hold time of 12 days.
