What the expected move tells you
The expected move is the range the options market is pricing for a given period. It comes from implied volatility, so it reflects what traders are paying for options right now. It measures size, not direction.
In statistical terms, the expected move is one standard deviation, often written as one sigma (σ). If returns followed a normal distribution, price would finish inside the expected move about 68% of the time and inside the 2x expected move, two sigma, about 95% of the time. Real markets have fatter tails than that model, so treat the bands as a map of where a move starts to get stretched, not as walls.
How it is calculated
Expected move = Price × Implied volatility × √(Days ÷ Days per year)
Implied volatility is quoted as a yearly figure, and the square root of time scales it down to the period you choose. At a hypothetical ES price of 6,000 with 15% implied volatility, one trading day gives 6,000 × 0.15 × √(1 ÷ 252), or about 57 points. Counting calendar days instead (365) gives about 47 points. Both conventions are common, so pick one and use it consistently.
The 2x expected move is simply twice that number on each side of the current price.
How futures traders use the bands
- Frame the day: the expected move high and low show how far the options market thinks price may travel before the move looks stretched.
- Spot unusual moves: price at or beyond the 2x expected move is statistically rare, and those extremes are worth watching for exhaustion.
- Combine with key levels: a band that lines up with a prior day high or a weekly median carries more weight than either level on its own.
For a deeper walkthrough, read how to trade expected moves.