Learn Trading Concepts
Clear, practical explanations of stock market terms and trading concepts — written for traders, not textbooks.
43 articles across 10 topics
Share Structure & Dilution
What Is Share Structure? A Trader's Guide
Share structure is the breakdown of a company's total shares into categories: authorized, outstanding, restricted, and float. It determines how many shares can trade freely and how dilution risk affects the stock price.
What Is Float in Stocks? Why Traders Watch It Closely
Float (or public float) is the number of a company's shares that are freely available for public trading. It excludes restricted shares, insider holdings, and locked-up shares. Low-float stocks are more volatile because fewer shares are available to buy and sell.
What Is Stock Dilution? How It Destroys Shareholder Value
Stock dilution occurs when a company issues new shares, reducing the ownership percentage of existing shareholders. Each share becomes worth less because the same company value is spread across more shares. Dilution is especially common in OTC and small-cap stocks that need cash.
What Are Low Float Stocks? Volatility, Squeezes & Risk
Low float stocks are shares with a small number of freely tradable shares — typically under 10-20 million. Because supply is limited, any surge in buying demand can cause dramatic price spikes. They are favorites of day traders and momentum players.
Authorized vs Outstanding Shares: What's the Difference?
Authorized shares are the maximum number of shares a company is legally allowed to issue, set in its corporate charter. Outstanding shares are the shares actually issued and held by investors. The gap between the two represents potential future dilution.
What Is Toxic Financing? The Hidden Killer of Penny Stocks
Toxic financing refers to convertible debt structures where lenders can convert their loans into stock at a discount to market price. As they convert and sell, the stock price drops, allowing them to convert even more shares at lower prices — creating a death spiral that wipes out existing shareholders.
Level 2 & Order Flow
What Is Level 2 Market Data? How to Read the Order Book
Level 2 market data shows the full order book: all pending buy orders (bids) and sell orders (asks) at different price levels, along with order sizes and the market makers or ECNs behind them. It goes beyond Level 1 data (best bid/ask only) to reveal the depth of supply and demand.
What Is the Bid-Ask Spread? Why It Matters for Every Trade
The bid-ask spread is the difference between the highest price a buyer is willing to pay (bid) and the lowest price a seller will accept (ask). It represents the immediate cost of executing a trade and is a key indicator of a stock's liquidity.
What Is Market Depth? Understanding Supply and Demand in Real Time
Market depth is a measure of the volume of buy and sell orders waiting at different price levels in the order book. Deep markets have lots of orders at many price levels (high liquidity). Thin markets have few orders (low liquidity, higher volatility).
What Is Time and Sales? Reading the Tape Like a Pro
Time and Sales (also called the tape) is a real-time record of every executed trade for a stock, showing the exact time, price, and number of shares traded. It reveals whether trades are hitting the bid (selling pressure) or the ask (buying pressure).
What Is an Order Book? How Stock Orders Get Matched
The order book is an electronic list of all pending buy and sell orders for a stock, organized by price level. Buy orders (bids) are sorted highest to lowest; sell orders (asks) are sorted lowest to highest. When a bid matches an ask, a trade executes.
OTC Markets
What Are OTC Markets? A Complete Guide for Stock Traders
OTC (over-the-counter) markets are decentralized exchanges where stocks trade directly between parties through a dealer network, rather than on a centralized exchange like NASDAQ or NYSE. OTC markets are home to thousands of smaller companies, penny stocks, and foreign ADRs.
What Are Pink Sheet Stocks? Risks, Tiers & How to Trade Them
Pink sheet stocks are securities traded on OTC Markets' Pink tier — the lowest tier with the least regulatory requirements. Companies on pink sheets may have limited financial disclosure, making them the riskiest category of publicly traded stocks.
OTCQB vs OTCQX: What's the Difference Between OTC Tiers?
OTCQX and OTCQB are the top two tiers of OTC Markets. OTCQX is the highest tier with the strictest requirements — companies must meet financial standards, have audited financials, and maintain a minimum bid price. OTCQB is the venture tier for early-stage companies that are SEC-reporting. Both are significantly more transparent than the Pink tier.
What Is Caveat Emptor in OTC Stocks? The Skull and Crossbones Warning
Caveat Emptor (Latin for 'buyer beware') is a warning flag placed on OTC stocks by OTC Markets Group when there are concerns about the company — including questionable promotion, fraud suspicion, undisclosed corporate actions, or complete lack of current information. It's the skull and crossbones of OTC trading.
SEC & Insider Filings
What Is SEC Form 4? How to Track Insider Buying and Selling
SEC Form 4 is a filing required whenever a company insider (officer, director, or 10%+ shareholder) buys or sells company stock. It must be filed within 2 business days of the transaction. Form 4 is the primary tool traders use to track insider activity.
What Is Insider Buying? How to Use It as a Trading Signal
Insider buying is when a company's officers, directors, or major shareholders purchase shares of their own company stock on the open market. It's widely considered one of the most reliable bullish signals because insiders have deep knowledge of their company's financial health and prospects.
10-K vs 10-Q: What's the Difference Between SEC Annual and Quarterly Filings?
The 10-K is a company's comprehensive annual report filed with the SEC, containing audited financial statements, risk factors, and management discussion. The 10-Q is the quarterly version — unaudited and shorter, but more frequent. Together they are the foundation of fundamental analysis.
Price Action & Market Structure
What Is Price Action? Reading Charts Without Indicators
Price action is the study of raw price movement on a chart over time. Instead of relying on indicators like RSI or MACD, price action traders read candlestick patterns, trends, and key levels directly. It's the foundation of technical analysis — everything else is derived from price.
What Are Support and Resistance? Key Levels Every Trader Must Know
Support is a price level where buying pressure tends to prevent further decline. Resistance is a price level where selling pressure tends to prevent further advance. These levels form because traders remember past price reactions and act on them, creating self-reinforcing zones where price is likely to bounce or stall.
What Are Supply and Demand Zones? Trading with Institutional Footprints
Supply and demand zones are price areas where a strong imbalance between buyers and sellers caused a sharp move. A demand zone is where aggressive buying launched price higher. A supply zone is where aggressive selling pushed price lower. Unlike support/resistance, these zones focus on the origin of the move, not just where price bounced.
What Is Market Structure? Trends, Breaks & Reversals Explained
Market structure is the pattern of swing highs and swing lows that defines the current trend. An uptrend has higher highs and higher lows. A downtrend has lower highs and lower lows. A break of structure (BOS) occurs when price violates the last significant swing point, signaling a potential trend change.
What Are Smart Money Concepts (SMC)? How Institutions Move Price
Smart Money Concepts (SMC) is a trading framework based on how institutional traders (banks, hedge funds, market makers) operate. It focuses on liquidity — where stop-losses cluster and create pools of orders that institutions target. Key concepts include order blocks, liquidity sweeps, fair value gaps, and inducement.
Risk Management & Position Sizing
What Is Risk Management? The Foundation of Profitable Trading
Risk management is the process of identifying, assessing, and controlling potential losses in trading. It includes position sizing, stop-loss placement, portfolio allocation, and maintaining a risk-reward framework. Without risk management, even the best trading strategy will eventually blow up an account.
What Is Position Sizing? How to Size Every Trade Correctly
Position sizing is the process of determining how many shares (or contracts) to buy or sell based on your account size, risk per trade, and the distance to your stop-loss. It turns a fixed dollar risk into the correct number of shares, ensuring consistent risk across trades regardless of stock price or volatility.
What Are Stop-Loss Orders? Protecting Your Capital on Every Trade
A stop-loss order is an instruction to sell a stock when it reaches a specific price, limiting the loss on a position. It automates your exit so emotions don't keep you in a losing trade. Stop-losses can be hard (actual orders in the market) or mental (price levels you commit to exiting at manually).
What Is Risk-Reward Ratio? How to Evaluate Every Trade Setup
Risk-reward ratio (R:R) compares the potential loss to the potential gain on a trade. A 1:3 R:R means you're risking $1 to make $3. Combined with win rate, risk-reward ratio determines whether a trading strategy is profitable over time. You can be wrong more often than right and still make money if your winners are larger than your losers.
What Is Drawdown? Understanding and Surviving Losing Streaks
Drawdown is the decline from a peak in your trading account to a subsequent low, expressed as a percentage. If your account grows from $10,000 to $15,000 and then drops to $12,000, your drawdown is 20% ($3,000 from the $15,000 peak). Maximum drawdown is the largest peak-to-trough decline in your trading history.
Options Basics
What Are Options? Calls, Puts, and How They Work
Options are financial contracts that give you the right — but not the obligation — to buy or sell a stock at a specific price (the strike price) before a specific date (the expiration). A call option gives you the right to buy; a put option gives you the right to sell. Options let traders profit from price movement, hedge positions, or generate income with defined risk.
What Are Call Options? Profiting When Stocks Go Up
A call option is a contract that gives the buyer the right to purchase 100 shares of a stock at a set price (the strike) before a set date (the expiration). You buy calls when you expect the stock to go up. The most you can lose is the premium you paid; your profit potential is theoretically unlimited as the stock rises.
What Are Put Options? Profiting When Stocks Go Down
A put option is a contract that gives the buyer the right to sell 100 shares of a stock at a set price (the strike) before a set date (the expiration). You buy puts when you expect the stock to go down, or when you want to protect (hedge) an existing long position. Your max loss is the premium paid; profit potential increases as the stock falls toward zero.
What Are the Options Greeks? Delta, Theta, Gamma & Vega Explained
The Options Greeks are measurements of how an option's price changes in response to different factors. Delta measures sensitivity to stock price change. Theta measures time decay. Gamma measures how fast delta changes. Vega measures sensitivity to volatility changes. Together, they tell you exactly how your option will behave as market conditions shift.
What Is Implied Volatility? Why It's the Hidden Driver of Options Prices
Implied volatility (IV) is the market's forecast of how much a stock is expected to move over the life of an option. High IV means options are expensive because the market expects big moves. Low IV means options are cheap. IV is derived from option prices — it's not a prediction of direction, only of magnitude.
Trading Psychology & Discipline
What Is Trading Psychology? Master Your Mind to Master the Market
Trading psychology is the study of how emotions, cognitive biases, and mental states affect trading decisions. Fear, greed, FOMO, overconfidence, and loss aversion are hardwired into the human brain — and they consistently push traders into bad decisions. Managing psychology is what separates consistently profitable traders from everyone else.
What Is FOMO in Trading? How Fear of Missing Out Destroys Accounts
FOMO (Fear of Missing Out) in trading is the anxiety-driven impulse to enter a trade because you see others profiting or a stock running without you. It leads to chasing entries at extended prices, oversizing positions to 'make up for missed gains,' and abandoning your trading plan. FOMO is one of the most common and costly emotional mistakes in trading.
What Is Revenge Trading? Breaking the Cycle of Emotional Losses
Revenge trading is the emotional response of immediately trying to make back money after a loss by taking impulsive, unplanned trades — often with larger position sizes and looser risk management. It's driven by anger, frustration, and the need to feel 'whole' again. Revenge trading almost always compounds losses because decisions are emotional, not analytical.
What Is Trading Discipline? Following Your Rules When It's Hardest
Trading discipline is the ability to consistently follow your trading plan — your entry rules, exit rules, position sizing, and risk limits — especially when emotions push you to deviate. It's not about willpower; it's about building systems and habits that make plan compliance the default behavior.
What Is a Trading Journal? The Tool That Actually Makes You Profitable
A trading journal is a systematic record of every trade you take — entry, exit, position size, setup type, emotional state, and outcome. The purpose isn't just record-keeping; it's pattern recognition. By reviewing your journal, you discover which setups actually work, which ones you think work, and where your behavior deviates from your plan.
Algo & AI-Assisted Trading
What Is Algorithmic Trading? How Automated Strategies Work
Algorithmic trading (algo trading) uses computer programs to execute trades based on predefined rules — price levels, volume conditions, technical indicators, or timing. Algorithms can range from simple (buy when RSI drops below 30) to complex (machine learning models trained on decades of data). They remove emotion from execution and can operate at speeds humans can't match.
What Is Backtesting? Testing Your Strategy Before Risking Real Money
Backtesting is the process of applying a trading strategy to historical market data to see how it would have performed. It lets you evaluate a strategy's profitability, drawdown, win rate, and risk profile before risking real capital. A backtest won't guarantee future results, but it can quickly eliminate strategies that don't work.
What Are Trading Signals? How to Use (and Not Abuse) Them
Trading signals are alerts or recommendations that suggest when to buy or sell a specific stock, typically including the ticker, direction, entry price, stop-loss, and target. Signals can be generated by human analysts, rule-based algorithms, or AI models. They range from free social media calls to paid subscription services and automated systems.
What Are Trading Bots? Automation for Individual Traders
Trading bots are software programs that automatically execute trades based on programmed rules or AI models. They connect to your brokerage account via API and can monitor markets, place orders, manage positions, and enforce risk limits 24/7 without human intervention. Bots range from simple scripts to complex AI-driven systems.
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