Glossary · 77 concepts · canonical definitions
Options Analytics
Concepts & Definitions
Every response field in the FlashAlpha Lab API maps to one of these concepts. Each has a canonical definition, math, interpretation rules, and a link to the endpoint that ships it.
Use this as your shared vocabulary when building dashboards, algos, or LLM agents against real-time options flow.
Exposure Analytics
Dealer positioning — gamma, delta, vanna, charm exposure
GEX
Gamma exposure
Gamma Squeeze
Runaway dealer buying
DEX
Delta exposure
VEX
Vanna exposure
CHEX
Charm exposure
Gamma Flip
Regime boundary strike
Call Wall
Upside resistance level
Put Wall
Downside support level
Gamma Regime
Positive vs negative gamma
Dealer Hedging
Shares traded per 1% move
Top Strikes
Highest-GEX strikes
Highest OI Strike
Most open interest
OI-Weighted DTE
Positioning duration
Zero-DTE Magnet
Intraday price magnet strike
Max Pain & Pin Analytics
Where option writers pin price at expiry
0DTE Analytics
Same-day expiry dynamics — acceleration, decay, expected move
Volatility Analytics
IV, RV, skew, term structure, dispersion, liquidity
VRP
Volatility Risk Premium
Implied Volatility
Market-expected vol
Realized Volatility
Actual stock movement
IV-RV Spread
VRP per lookback window
IV Rank
IV in 52-week range
IV Percentile
% of days IV was lower
Vol of Vol
Volatility of IV
Volatility Skew
Put/call IV asymmetry
IV Term Structure
Contango / backwardation
IV Dispersion
Surface roughness
OI Concentration
Herfindahl index
Options Liquidity
Bid/ask spread tightness
Greeks — First Order
Primary sensitivities — delta, gamma, theta, vega, rho
Greeks — Second Order
Cross-sensitivities that drive dealer flow — vanna, charm, vomma
Greeks — Third Order & Advanced
Higher-order and exotic sensitivities used by market makers
Pricing & Sizing
Position sizing and risk-of-ruin rules
Vol Surface — Alpha Tier
SVI surface, variance grid, arbitrage flags, smoothed IV
SVI
Vol surface model
Variance Surface
Total variance grid
Arbitrage Flags
Butterfly / calendar violations
Variance Swap
Fair variance per expiry
SVI-Smoothed IV
Noise-free implied vol
Fair Vol
Variance-swap ATM vol
Convexity Premium
Wing IV minus ATM
Smile Ratio
25Δ put/call IV ratio
Tail Convexity
Left-wing curvature
VRP Analytics — Alpha Tier
Premium-selling composites & vol pricing regimes
Harvest Score
Premium-selling composite
Dealer Flow Risk
Hedging risk score
VRP Regime
Vol pricing state
GEX-Conditioned VRP
Gamma-adjusted VRP
VRP Z-Score
Rolling premium percentile
Term VRP
Per-DTE IV-RV spread
Directional VRP
Upside / downside split
Net Harvest Score
Risk-adjusted harvest
Strategy Scores
Strangle / condor / calendar attractiveness
Macro Context
VIX complex, sentiment, and cross-asset vol signals
Foundations & Strategies
Glossary fundamentals and strategy concepts
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