Inputs
Enter mock spot, implied volatility, and days to expiration. Formula: move ≈ spot × IV × √(DTE/365)
±1σ band
This is an estimate, not a forecast. Real moves can be larger or smaller.
Expected move (±)
—
As % of spot
—
Lower band
—
Upper band
—
—
Spot
—
Earnings window — label only; math unchanged
- ±1σ is a common educational rule of thumb from annualized IV scaled by √time.
- Does not account for skew, jumps, or event risk beyond the optional label.
- Not a probability guarantee and not a trade recommendation.