How to use it
Enter the stock price plus either implied volatility and days, or the at-the-money straddle price. You’ll get the expected one-standard-deviation move in dollars and percent, and the ~68% and ~95% ranges the market is pricing in.
Why traders use it
The expected move frames whether a strike, target, or breakeven is inside or outside what the
market considers likely. Selling premium outside the expected move, or buying a move you think will
exceed it, both start from this number. 1 SD ≈ price × IV × √(days ÷ 365).
TradeCaliper is a planning and education tool, not financial advice.