Trading 101

Learn to Trade

Everything you need to understand stock markets, read charts, and build a strategy — from first principles.

Market Basics

A stock represents a fractional ownership stake in a company. When you buy a share, you own a tiny piece of that business and participate in its profits and losses.

Stock ExchangeA marketplace where buyers and sellers trade stocks. The two largest US exchanges are the NYSE (New York Stock Exchange) and NASDAQ.
Market HoursUS markets trade Monday–Friday, 9:30 AM – 4:00 PM ET. Pre-market (4–9:30 AM) and after-hours (4–8 PM) trading exists but has lower liquidity.
Bull MarketA period of rising prices, generally defined as a 20%+ gain from a recent low. Typically driven by economic growth and investor optimism.
Bear MarketA decline of 20%+ from recent highs. Driven by slowing growth, rising rates, or fear. Historically lasts 9–18 months.
LiquidityHow easily a stock can be bought or sold without moving its price. Large-cap stocks (AAPL, MSFT) are highly liquid; small-caps are not.
Bid / Ask SpreadThe bid is the highest price a buyer will pay; the ask is the lowest a seller will accept. The spread is the difference — your immediate cost of trading.
FauxFolio simulates real market hours using live Finnhub data. Outside market hours, the engine uses Geometric Brownian Motion — the same math behind Black-Scholes options pricing.

Order Types

How you submit an order determines when and at what price your trade executes. Choosing the right order type is critical to getting a good fill.

Market OrderInstant

Executes immediately at the best available price. Simple and reliable for liquid stocks, but you're not guaranteed a specific price.

Best for: liquid large-caps when speed matters more than a few cents.

Limit OrderPrice-controlled

Only executes at your specified price or better. A buy limit executes at or below your price; a sell limit at or above.

Best for: entering positions at a specific target, avoiding bad fills on volatile stocks.

Stop-LossRisk protection

Becomes a market order when the stock hits your stop price. Automatically exits a losing position to cap your downside.

Best for: protecting gains and limiting losses when you can't watch the market.

Stop-LimitHybrid

Triggered like a stop order but converts to a limit order. Prevents a bad fill on a fast-moving stock — but risks not filling at all.

Best for: volatile stocks where you need downside protection but want price control.

FauxFolio supports Market and Limit orders. Practice setting limit orders 1–2% below the current price to simulate patient buying.

Reading a Stock

A stock's page is packed with data. Here's what the key numbers mean and how to use them.

Ticker SymbolThe stock's unique abbreviation (e.g., AAPL = Apple, TSLA = Tesla). US tickers are 1–4 letters.
Market CapShare price × total shares outstanding. The primary measure of a company's size. Large cap: $10B+, Mid cap: $2–10B, Small cap: under $2B.
VolumeNumber of shares traded today. High volume confirms a price move; low volume makes it suspect. Compare to the 30-day average volume.
P/E RatioPrice-to-Earnings: share price ÷ earnings per share (EPS). Measures how much you're paying for $1 of profit. A P/E of 20 means investors pay $20 per $1 of earnings. Higher P/E = growth expectations baked in.
52-Week RangeThe stock's high and low over the past year. Buying near the 52-week low can indicate value; near the high may signal momentum.
BetaMeasures volatility relative to the S&P 500. Beta of 1.5 = moves 50% more than the index. High-beta stocks amplify both gains and losses.
Dividend YieldAnnual dividend ÷ share price. Only relevant for dividend-paying stocks. A 3% yield means $3 paid per year on a $100 stock.
EPS (TTM)Earnings Per Share (trailing twelve months). The company's net profit divided by shares outstanding. Rising EPS = growing profits.
Never use a single metric in isolation. A low P/E can mean undervalued — or it can mean the business is declining. Always cross-reference multiple data points.

Portfolio Management

A great portfolio isn't just picking winners — it's managing risk through structure, sizing, and discipline.

Diversification

Spread capital across multiple stocks, sectors, and asset classes. If one position falls 50%, a diversified portfolio might only drop 5%. Rule of thumb: no single position should exceed 10–15% of your total portfolio.

Position Sizing

Decide how much to allocate to each trade based on conviction and risk. The 2% rule: never risk more than 2% of your total portfolio on a single trade. With $10,000, that's $200 max loss per position.

Rebalancing

Over time, winners grow to dominate your portfolio, creating unintended concentration. Rebalancing — selling winners and buying laggards — restores your target allocation. Most investors rebalance quarterly or annually.

Cash Reserve

Keeping 5–20% in cash gives you "dry powder" to buy dips without selling existing positions. During market crashes, cash is your most powerful asset.

In FauxFolio, track your portfolio allocation on the Portfolio page. Aim to hold 5–10 positions across different sectors before going deep into any single stock.

Options Trading

Options are contracts that give you the right, but not the obligation, to buy or sell a stock at a fixed price before a specific date. They're powerful — and complex.

Call Option

The right to buy 100 shares at the strike price before expiry. You buy calls when you're bullish on the stock.

Example: AAPL $200 Call, exp. June 20
If AAPL hits $210, your call is worth ~$10/share × 100 = $1,000
If AAPL stays below $200, the call expires worthless
Put Option

The right to sell 100 shares at the strike price before expiry. You buy puts when you're bearish or want to hedge a long position.

Example: TSLA $240 Put, exp. June 20
If TSLA drops to $220, your put is worth ~$20/share × 100 = $2,000
If TSLA stays above $240, the put expires worthless

Key Options Concepts

PremiumThe price you pay for the option contract. This is your maximum loss when buying options.
Strike PriceThe fixed price at which the option lets you buy (call) or sell (put) the underlying stock.
Expiration DateThe last day the option can be exercised. Options lose value as expiry approaches — this is called time decay.
In / Out of the MoneyITM = the option has intrinsic value (call: stock above strike). OTM = the option would be worthless if exercised today.
Delta (Δ)How much the option price moves per $1 move in the stock. A delta of 0.5 means the option gains $0.50 for every $1 the stock rises.
Theta (Θ)Time decay. Options lose value every day as expiry approaches. Theta is your enemy when buying options, your friend when selling them.
Implied VolatilityThe market's expectation of future price swings. High IV = expensive options. Buying options before earnings can be costly even if you're right about direction.

Common Strategies

Covered Call — Own 100 shares, sell a call against them. Generates income but caps your upside.
Cash-Secured Put — Sell a put while holding enough cash to buy the shares if assigned. A way to get paid to buy stocks you want at a discount.
Long Call — Buy a call option. Leveraged bullish bet with limited downside (only the premium paid).
Protective Put — Buy a put on a stock you own. Acts like insurance against a large drop.
Paper options are available in FauxFolio — open any stock page and switch to the Options tab to trade. Options can expire completely worthless; most retail options buyers lose money. Master the Greeks before sizing up.

Risk Management

The traders who survive long-term aren't the ones who pick the most winners — they're the ones who protect their capital when they're wrong.

2% Rule

Never risk more than 2% of your total account on a single trade. Lets you survive 50 consecutive losses before account ruin.

Cut Losses Quickly

Set a max loss per trade (e.g., 7-8%) and stick to it. Letting a small loss become a large one is the most common beginner mistake.

Let Winners Run

Don't sell a winner just because it's up 10%. Use trailing stop-losses to ride momentum while protecting profits.

Avoid Revenge Trading

After a loss, the urge to immediately win it back leads to reckless trades. Take a break and stick to your plan.

Don't Chase

If you missed the move, wait for a pullback. Buying after a stock is already up 30% in a week is chasing, not trading.

Keep a Journal

Record every trade: why you entered, your target, your stop, and the outcome. Patterns in your mistakes are worth more than any strategy.

Use FauxFolio to practice these rules with zero real-money risk. Set yourself a goal: treat your $10,000 virtual account as if it were $100,000 real dollars. The discipline you build now carries directly to real trading.

Put it into practice

Start with $10,000 virtual cash. No real money required.