# OptionsMovement

> Free expected-move calculator for US stock options. For any ticker it reports the options-implied one-standard-deviation range for each upcoming expiry, max pain, put/call ratio and the probability the stock closes inside the range. Data is delayed at least 15 minutes and comes from listed option prices.

Definitions used on every page: expected move = one standard deviation of the price at expiry, implied by ATM option prices. Under 8 days to expiry it is the liquidity-weighted ATM straddle price divided by 0.7979 (sqrt(2/pi)); from 8 days it is ATM implied volatility times sqrt(days/365). Max pain = the strike at which the total intrinsic value paid to option holders is smallest.

## Pages
- [Calculator](https://optionsmovement.com/): type a ticker, get the range per expiry
- [Methodology](https://optionsmovement.com/methodology): formulas, data source, limitations
- [JSON API](https://optionsmovement.com/api/expected-move/AAPL): GET /api/expected-move/{SYMBOL}, free, attribution requested
- [Share card](https://optionsmovement.com/img/AAPL.png): GET /img/{SYMBOL}.png, a 1200x630 image of the expected move; embed widget at /embed/{SYMBOL}

## Guides
- [Expected move explained: what the options market is telling you](https://optionsmovement.com/blog/expected-move-explained): How to read the expected move, why one standard deviation is the honest number, and how to use it to size trades and set targets.
- [How to calculate the expected move from a straddle (with a worked example)](https://optionsmovement.com/blog/how-to-calculate-expected-move-from-a-straddle): The straddle shortcut, why the 0.85 rule of thumb understates the range, and the sqrt(2/pi) correction that lines it up with implied volatility.
- [Max pain explained: how it is calculated and whether it actually pulls price](https://optionsmovement.com/blog/max-pain-explained): The exact max pain formula, what dealer hedging has to do with it, and what the evidence says about pinning into expiry.
- [0DTE expected move: sizing same-day SPX and SPY trades](https://optionsmovement.com/blog/0dte-expected-move): Why the straddle method is the right one for zero days to expiry, how the range shrinks through the session, and where the usual mistakes are.
- [Earnings implied move vs actual move: how to tell if options are overpriced](https://optionsmovement.com/blog/earnings-implied-move-vs-actual): Isolating the earnings-day move from the chain, comparing it with past prints, and deciding between buying and selling the event.
- [Put/call ratio: what it measures and what it does not](https://optionsmovement.com/blog/put-call-ratio-explained): Volume vs open interest versions, why the "0.7 bullish, 1.2 bearish" rule fails on index products, and how to read it next to the expected move.
- [Implied volatility vs expected move: the square root of time rule](https://optionsmovement.com/blog/implied-volatility-vs-expected-move): Turning an annualised IV number into a dollar range for any expiry, and why a 30% IV stock is not expected to move 30%.

## Stock pages (server-rendered, updated through the trading day)
- https://optionsmovement.com/stocks/SPY
- https://optionsmovement.com/stocks/QQQ
- https://optionsmovement.com/stocks/IWM
- https://optionsmovement.com/stocks/DIA
- https://optionsmovement.com/stocks/XLF
- https://optionsmovement.com/stocks/XLE
- https://optionsmovement.com/stocks/GLD
- https://optionsmovement.com/stocks/TLT
- https://optionsmovement.com/stocks/AAPL
- https://optionsmovement.com/stocks/MSFT
- https://optionsmovement.com/stocks/NVDA
- https://optionsmovement.com/stocks/AMZN
- https://optionsmovement.com/stocks/GOOGL
- https://optionsmovement.com/stocks/META
- https://optionsmovement.com/stocks/TSLA
- https://optionsmovement.com/stocks/AVGO
- https://optionsmovement.com/stocks/BRK-B
- https://optionsmovement.com/stocks/AMD
- https://optionsmovement.com/stocks/INTC
- https://optionsmovement.com/stocks/MU
- https://optionsmovement.com/stocks/ARM
- https://optionsmovement.com/stocks/SMCI
- https://optionsmovement.com/stocks/QCOM
- https://optionsmovement.com/stocks/TXN
- https://optionsmovement.com/stocks/AMAT
- https://optionsmovement.com/stocks/LRCX
- https://optionsmovement.com/stocks/MRVL
- https://optionsmovement.com/stocks/TSM
- https://optionsmovement.com/stocks/NFLX
- https://optionsmovement.com/stocks/CRM
- https://optionsmovement.com/stocks/ORCL
- https://optionsmovement.com/stocks/ADBE
- https://optionsmovement.com/stocks/PLTR
- https://optionsmovement.com/stocks/SNOW
- https://optionsmovement.com/stocks/CRWD
- https://optionsmovement.com/stocks/PANW
- https://optionsmovement.com/stocks/NET
- https://optionsmovement.com/stocks/DDOG
- https://optionsmovement.com/stocks/ZS
- https://optionsmovement.com/stocks/SHOP
- https://optionsmovement.com/stocks/UBER
- https://optionsmovement.com/stocks/ABNB
- https://optionsmovement.com/stocks/PYPL
- https://optionsmovement.com/stocks/SQ
- https://optionsmovement.com/stocks/IBM
- https://optionsmovement.com/stocks/CSCO
- https://optionsmovement.com/stocks/NOW
- https://optionsmovement.com/stocks/COIN
- https://optionsmovement.com/stocks/MSTR
- https://optionsmovement.com/stocks/HOOD
- https://optionsmovement.com/stocks/SOFI
- https://optionsmovement.com/stocks/GME
- https://optionsmovement.com/stocks/AMC
- https://optionsmovement.com/stocks/RIVN
- https://optionsmovement.com/stocks/LCID
- https://optionsmovement.com/stocks/NIO
- https://optionsmovement.com/stocks/BABA
- https://optionsmovement.com/stocks/JPM
- https://optionsmovement.com/stocks/BAC
- https://optionsmovement.com/stocks/WFC
- https://optionsmovement.com/stocks/GS
- https://optionsmovement.com/stocks/MS
- https://optionsmovement.com/stocks/C
- https://optionsmovement.com/stocks/V
- https://optionsmovement.com/stocks/MA
- https://optionsmovement.com/stocks/AXP
- https://optionsmovement.com/stocks/XOM
- https://optionsmovement.com/stocks/CVX
- https://optionsmovement.com/stocks/COP
- https://optionsmovement.com/stocks/OXY
- https://optionsmovement.com/stocks/BA
- https://optionsmovement.com/stocks/CAT
- https://optionsmovement.com/stocks/DE
- https://optionsmovement.com/stocks/GE
- https://optionsmovement.com/stocks/LMT
- https://optionsmovement.com/stocks/RTX
- https://optionsmovement.com/stocks/HON
- https://optionsmovement.com/stocks/UPS
- https://optionsmovement.com/stocks/F
- https://optionsmovement.com/stocks/GM
- https://optionsmovement.com/stocks/AAL
- https://optionsmovement.com/stocks/UNH
- https://optionsmovement.com/stocks/LLY
- https://optionsmovement.com/stocks/JNJ
- https://optionsmovement.com/stocks/PFE
- https://optionsmovement.com/stocks/MRK
- https://optionsmovement.com/stocks/ABBV
- https://optionsmovement.com/stocks/MRNA
- https://optionsmovement.com/stocks/COST
- https://optionsmovement.com/stocks/WMT
- https://optionsmovement.com/stocks/HD
- https://optionsmovement.com/stocks/LOW
- https://optionsmovement.com/stocks/TGT
- https://optionsmovement.com/stocks/NKE
- https://optionsmovement.com/stocks/SBUX
- https://optionsmovement.com/stocks/MCD
- https://optionsmovement.com/stocks/DIS
- https://optionsmovement.com/stocks/PG
- https://optionsmovement.com/stocks/KO
- https://optionsmovement.com/stocks/PEP