Trading & options glossary, in plain English

No jargon left unexplained. Each term gets one clear page — the same plain-English style as the desk's beginner handbook. Research and education only — not financial advice.

• Options, In Plain English — the free beginner handbook chapter: calls, puts, premium, Greeks, IV crush.
• After-Hours Trading: Thin Liquidity, Wide Spreads, and Misleading Prints — After-hours trading is buying and selling outside the 9:30am-4:00pm ET session. Thin liquidity, wide spreads, and w…
• Base and Quote Currency: How to Read a Forex Pair — How to read a forex pair like EUR/USD: which currency is the base, which is the quote, what a rising pair means, an…
• Breakout trading: the break is the easy part, the confirmation is the trade — Breakout trading only works when volume confirms the break. Breakouts vs fakeouts, why trigger-zone entries beat an…
• Buying Power: Cash, Margin, and Leverage That Cuts Both Ways — Buying power is how much you can put to work — not how much you have. Cash vs margin buying power, options buying p…
• Cash-Secured Put: Getting Paid to Wait to Buy a Stock — Cash-secured put explained: sell a put, set aside the cash, and get paid to wait to buy a stock. Worked example, br…
• Covered calls: getting paid to cap your own upside — A covered call = own 100 shares and sell a call against them. Plain-English income-vs-capped-upside math, a worked …
• Credit Spread Options: Defined Risk, and the Risk-Reward Beginners Miss — Credit spread options: bull put vs bear call, the max profit and loss math, why defined risk isn't small, and the r…
• Debit spreads: paying less to cap your cost and your risk — A debit spread pays a net premium to cap cost and risk. Worked bull-call example, the max-loss and break-even math,…
• EUR/USD Pip Value: Why One Pip Is Always $10 Per Standard Lot — EUR/USD pip value is $10 per standard lot, $1 per mini, $0.10 per micro — fixed at any rate. See the math, a 35-pip…
• Exercising an Option vs Selling to Close — Exercising an option captures only intrinsic value — selling to close captures more. Why most traders sell, plus au…
• Extrinsic Value (Time Value): The Rented Part of Every Premium — Extrinsic value is the time-value half of an options premium — the rented part that decays via theta and swells wit…
• Forex Leverage: How a Small Move Gets Amplified — Both Ways — Forex leverage explained: how 50:1 and 100:1 amplify a small move both ways, how margin calls happen, and why overl…
• Forex Margin: The Deposit That Holds Your Position Open — Forex margin in plain English: the good-faith deposit, used vs free margin, how margin level % works, and the margi…
• Forex Order Types: Market, Limit, Stop, Stop-Limit — and When Each One Fires — Forex order types explained: market, limit, stop, and stop-limit — plus buy-stop vs buy-limit, why FX signals use p…
• Forex Pip Value: What One Pip Is Worth on Your Trade — What a pip is worth by pair and lot size: $10 per pip on a standard EUR/USD lot, why JPY pairs differ, the pip-valu…
• Forex Spread Explained: The Toll You Pay Before Price Moves — The forex spread is the core cost of every trade — measured in pips, tighter on majors, wider on exotics and in thi…
• Forex Swap and Rollover: The Overnight Cost Nobody Quotes — Forex swap and rollover explained: overnight interest, positive vs negative carry, the carry trade, triple-swap Wed…
• Gap Trading: Gap-and-Go, Gap-Fill, and the No-Chase Rule — Gap trading explained: why stocks gap up or down overnight, gap-and-go vs gap-fill, and why chasing a gap open is t…
• GBP/USD Pip Value: What One Pip on Cable Is Worth — GBP/USD pip value is fixed at $10 per standard lot, $1 per mini, $0.10 per micro — regardless of rate. Worked cable…
• Implied volatility rank (IV Rank), explained — Implied volatility rank (IV Rank) shows where current IV sits in its 52-week range. Formula, a worked example, and …
• Iron Condor: Two Credit Spreads That Bet on a Quiet Stock — An iron condor is two credit spreads that profit when a stock stays range-bound: the defined-risk math, a worked ex…
• LEAPS Options: Long-Dated Contracts Used as a Stock Substitute — LEAPS options are long-dated calls used as a leveraged, capital-efficient stock substitute with slower theta decay …
• Limit Orders: Why Options Should Almost Always Use One — A limit order names your price; a market order takes any. Why options should almost always use limits, how mid-pric…
• London Session Forex: The Hours That Do the Heavy Lifting — London session forex, explained: the Asia range, open volatility, the NY overlap, a UTC/ET session clock, and why t…
• Major Currency Pairs: The Seven the Whole Market Trades — The seven major currency pairs, why they hold the deepest liquidity and tightest spreads, how minors and exotics di…
• Market Orders: When They're Fine, and When They Cost You — A market order fills instantly at the best available price. Fine on liquid stocks with penny spreads; on wide optio…
• Max pain options: the price where most contracts expire worthless — Max pain is the strike where the most options expire worthless. Here's how it's calculated, the thin grain of truth…
• Moneyness: What ITM, ATM, and OTM Actually Mean — Moneyness — ITM, ATM, OTM — is just the strike versus the stock. One table for calls and puts, how it maps to delta…
• Moving Average Trading: What the 20, 50, and 200 Actually Tell You — SMA vs EMA, the 20/50/200-day periods that matter, why moving averages lag price, and how our desk reads distance-f…
• Open Interest in Options: The Liquidity Signal Behind the Number — Open interest counts the live option contracts at a strike — the honest read on liquidity. OI vs volume, spreads, a…
• Option Assignment: When a Short Option Comes Due — Option assignment is what happens when a short option is exercised against you: when it triggers, the dividend earl…
• Option Buying Power: Why It's Cash-Only — Option buying power explained: why long options must be paid in cash, how credit spreads reduce buying power by max…
• Option Delta: The Lean, the Odds, and Why It Never Sits Still — Option delta measures how much an option's price moves per $1 in the stock — and doubles as a rough probability gau…
• Option Rho: The Forgotten Greek That Wakes Up in a Rate Shock — Option rho measures how much an option's price moves per one-point rate change — the forgotten Greek that wakes up …
• Option Vega: The Greek That Charges You for Drama — Option vega measures how much an option's price changes per one-point move in implied volatility — and why options …
• Pip value table: what one pip is worth per lot size — Pip value table for the major forex pairs by standard, mini, and micro lot — plus the formula to compute pip value …
• Position sizing: the decision that keeps your account alive — Position sizing is the real edge in trading: fixed-risk sizing, why over-sizing blows accounts, and a worked exampl…
• Premarket trading: thin liquidity, loud prints, and what they actually mean — Premarket trading runs on thin liquidity and wide spreads, so early prints often mislead. What the session is, and …
• Relative volume (RVOL): the difference between a move and a rumor of one — Relative volume (RVOL) compares today's volume to its normal baseline. Why 2x+ validates a move, how scanners use i…
• Scalping Trading: Why the Spread Usually Wins — Scalping trading skims tiny, fast moves — but the bid-ask spread and fixed costs eat most of the target. The honest…
• Short Interest: Days to Cover, Squeezes, and What the Number Can't Tell You — Short interest is the % of a stock's float sold short. What days-to-cover means, why high short interest fuels sque…
• Short Selling: Borrowing to Sell, and the Unlimited-Loss Risk — Short selling means borrowing shares to sell high and buy back lower. How buy-to-cover works, why the loss is unlim…
• Short squeeze: forced covering, and why most squeeze plays fail — A short squeeze is forced covering when high short interest meets a catalyst. Why the feedback loop runs, why most …
• Slippage: The Gap Between the Price You Saw and the Price You Got — Slippage is the gap between the price you expected and the fill you got. Why market orders on thin names and option…
• Stock Beta: How Much a Stock Leans on the Market — Stock beta measures how much a stock moves versus the market: above 1 swings harder, below 1 calmer. Worked sizing …
• Stock Float: The Shares That Actually Trade, and Why It Matters — Float is the shares available to trade — not shares outstanding. Why low-float stocks move violently, how float fue…
• Stock halts: news-pending, volatility (LULD), and the reopen auction — A stock trading halt pauses one name — news-pending or volatility (LULD). Why stocks halt, how the reopen auction w…
• Support and Resistance: Trading Zones, Not Lines — Support and resistance are zones, not lines. How levels earn weight, anchor triggers and stops, act self-fulfilling…
• The Bid-Ask Spread: What It Really Costs to Get In and Out — The bid-ask spread is a toll you pay entering and exiting an option. Why wide spreads on thin chains bleed you, and…
• The MACD Indicator, in Plain English: Confirmation, Not Prophecy — The MACD indicator in plain English: MACD line, signal line, histogram, crossovers, and why a lagging tool confirms…
• The Pattern Day Trader Rule, and What $25,000 Actually Buys — The pattern day trader rule flags 4+ day trades in 5 days and requires $25k in a margin account. How it limits smal…
• The Risk/Reward Ratio: How R-Multiples Decide a System — The risk reward ratio in plain English: how stops and targets set your R, why a 40% win rate can still profit at 2R…
• The RSI Indicator, Without the Myths — RSI(14) explained without the myths: what overbought and oversold mean, how divergence works, and why the RSI indic…
• The Stop-Limit Order: Price Protection With a Catch — A stop-limit order protects your fill price but can miss on a gap. Stop vs stop-limit, the gap-through trap, and wh…
• Unusual Options Activity: What the Tape Actually Tells You — Unusual options activity flags sweeps and blocks as 'smart money' — but the tape hides the hedge, the other leg, an…
• USD/JPY Pip Value: The Divide-by-the-Rate Case — USD/JPY pip value = ¥1,000 ÷ rate per standard lot: $6.90 at 145, $6.67 at 150, $6.25 at 160. Why it falls as the r…
• VWAP Trading: Reading the Volume-Weighted Fair-Value Line — VWAP trading explained: the volume-weighted average price as an intraday fair-value benchmark, why desks anchor to …
• Weekly Options: Short Expiry, Fast Theta, and the Lottery Math — Weekly options expire in days, not months. Why the premiums look cheap, why the time value melts so fast, and why t…
• What Are 0DTE Options? Same-Day Expiry, in Plain English — 0DTE options expire the same day you trade them. What that does to theta, gamma and premium — plain-English risk ma…
• What counts as a day trade? — A day trade means opening and closing the same security in the same trading day in a margin account. Edge cases, th…
• What Is a Backtest? (And Why You Should Distrust a Beautiful One) — What is a backtest? Plain-English definition, lookahead and survivorship bias, overfitting — and why our best-looki…
• What Is a Basis Point? — What is a basis point? 1 basis point = 0.01% = 0.0001. Learn how bps measure rates, spreads, and fees, and why the …
• What is a call option? A coupon on a stock, with a deadline — A call option is a coupon that locks in a buy price. Plain-English definition, a worked $20-strike example with pre…
• What Is a Carry Trade in Forex? — What is a carry trade in forex? You borrow a low-yield currency, hold a high-yield one, and earn the interest gap -…
• What Is a Circuit Breaker? How Markets Halt Themselves — A stock circuit breaker is an automatic trading halt that pauses the market or one stock when prices move too far, …
• What Is a Death Cross? — What is a death cross? It's when the 50-day moving average crosses below the 200-day. Learn the mechanics, why it l…
• What Is a Forex Lot? The Unit That Sets Your Position Size — A forex lot is a unit of position size: standard 100k, mini 10k, micro 1k, nano 100 units. See pip values by lot an…
• What is a gamma squeeze? The dealer hedging feedback loop — A gamma squeeze is a dealer-hedging feedback loop. How it actually works, why it is rare and crowded, and the real …
• What Is a Golden Cross? — What is a golden cross? It's when the 50-day moving average crosses above the 200-day. Learn the mechanics, why it …
• What Is a Margin Call? — What is a margin call? A broker demand to add cash or close positions when your equity falls below maintenance marg…
• What Is a Pip in Forex? The Unit Everything Else Is Priced In — What a pip is in forex — 0.0001 on most pairs, 0.01 on yen pairs — plus pip values by lot size, spreads in pips, an…
• What Is a Put Option? The Right to Sell at a Locked-In Price — What a put option is, in plain English: the insurance analogy, betting on downside, hedging shares you own, a worke…
• What Is a Stock Split? Forward, Reverse, and What Actually Changes — A stock split changes share count and price in proportion, so total value is unchanged. Forward vs reverse splits e…
• What Is a Stop Loss? The Exit You Write Before You Enter — A stop loss is a pre-decided invalidation point, not a mood. Hard vs close-basis stops, why resting stops misfire o…
• What Is a Strike Price? The Line Where an Option's Right Kicks In — The strike price is where an option's right kicks in. ITM, ATM, and OTM explained with a real contract, plus how st…
• What Is a Ticker Symbol? From Stocks to Option Codes — A ticker is a stock's short trading code. How share classes (GOOGL vs GOOG), option symbols encoding strike and exp…
• What Is a Trading Trigger? Entry on Confirmation, Not 'Buy Now' — A trading trigger entry means acting only when a written condition confirms — not when an alert says 'buy now'. Zon…
• What Is a Trailing Stop? — What is a trailing stop? A stop order that follows price by a set percent or dollar amount, locking in gains while …
• What Is an ETF? The Trader's Definition — An ETF is a basket of assets that trades like a stock. Learn how ETFs differ from single stocks and why SPY and QQQ…
• What Is an IPO? The Lockup, the Volatility, and the Hype-Fade — An IPO is a company's first public sale of shares. Learn the lockup period, why newly-public names are volatile, wh…
• What Is an Options Premium? The Price Tag on Every Contract — Options premium, explained: intrinsic vs time value, why it's quoted per share but paid ×100, and why the premium i…
• What Is Day Trading? The Rules, the Odds, and the Risk Truths — What is day trading? The definition, the PDT $25,000 rule, the honest odds from research, and why discipline beats …
• What is dollar-cost averaging? The schedule that beats the guess — Dollar-cost averaging: investing a fixed amount on a set schedule regardless of price. How it cuts timing risk, a w…
• What Is Implied Volatility? The Price the Market Puts on Movement — Implied volatility is the market's price for expected movement. High vs low IV, IV rank and percentile, and why buy…
• What Is Intraday Buying Power? — Intraday buying power is 4x maintenance margin excess for pattern day traders. See the formula, why it resets daily…
• What is IV crush? Right on the stock, red on the option — IV crush is the expectation premium deflating after earnings. A worked example of right on direction, still losing …
• What Is Market Cap? The Number That Shapes How a Stock Trades — Market capitalization is share price times shares outstanding. Learn the large/mid/small/micro tiers and why cap dr…
• What is option gamma? Delta's accelerator pedal — Option gamma is how fast delta changes as a stock moves. Why near-strike, near-expiry contracts move violently — pl…
• What Is Paper Trading? What It Proves — and What It Quietly Can't — Paper trading tests process with fake money at real prices. What it proves, what it can't — fills, slippage, nerves…
• What is profit factor? Gross wins ÷ gross losses — and one big catch — Profit factor = gross wins ÷ gross losses. What 0.82 vs 1.41 means, using our published simulated record — and how …
• What Is Swing Trading? Holding a Trade Across Days and Weeks — Swing trading is holding a trade for days to weeks. The overnight gaps, earnings risk, time-stops, and position siz…
• What Is the Dollar Index (DXY)? — What is the dollar index DXY? A plain guide to its six-currency basket, EUR-heavy weights, and the inverse moves it…
• What Is the Intrinsic Value of an Option? — Intrinsic value of an option, defined: the ITM math for calls and puts, why it's the hard floor under the price, an…
• What is the VIX? Reading the market's fear gauge — The VIX is the S&P 500's 30-day expected volatility — the fear gauge. How it maps to option IV, why spikes inflate …
• What Is Theta Decay? The Melting Ice Cube Inside Every Option — Theta decay is the daily melt of an option's time value: what it costs per day, why it accelerates near expiry, and…
• What Is Volatility Skew? — What is volatility skew? Why downside puts carry higher implied volatility than calls, how the smile and smirk form…
• What Moves Forex Prices: Rates, Data, and Risk Appetite — Interest rates, central banks, CPI, NFP and risk sentiment — the macro forces that move currency pairs, plus how to…
• What time do options expire? — Options stop trading at 4pm ET on expiration day; some ETF and index options run to 4:15pm. Auto-exercise triggers …
• XAUUSD pip value: what a gold pip is actually worth — Gold pip value depends on the broker convention: a $0.10 move on 100 oz = $10, a $0.01 move = $1. Contract-size tab…

Disclosures. ClaudeQuantAlgo is a research and education community. Nothing on this page constitutes financial, investment, legal, or tax advice, or a recommendation to buy or sell any security or derivative. No profit promises are made, ever — trading stocks, options, and forex involves substantial risk of loss; options positions can lose 100% of their value. The public scoreboard reflects a model ("paper") desk — no real money. Past performance — real, paper, or simulated — never guarantees future results. Hypothetical and simulated results have inherent limitations and no representation is made that any account will or is likely to achieve similar profits or losses. ClaudeQuantAlgo is not a registered investment adviser or broker-dealer. You are solely responsible for your own trading decisions. Never risk money you cannot afford to lose.