What Is a Stock?
Before you can research a company or read a signal, you need to understand what you're actually buying when you buy a stock.
Ownership in a company
When you buy a stock, you're buying a small piece of ownership in a real company. If Apple has 16 billion shares outstanding and you buy 10 shares, you own 10/16,000,000,000th of Apple.
That sounds tiny — and it is. But it means you benefit when Apple does well, and you lose when Apple struggles. Your investment goes up and down with the company.
A share is a single unit of ownership in a company. A stock is the collection of all shares. When people say "I bought Apple stock," they mean they bought shares of Apple.
Why do companies sell stock?
Companies sell stock to raise money. Instead of taking a bank loan, they sell pieces of the company to the public. That money funds growth — new products, hiring, expansion.
The first time a company sells stock to the public is called an IPO — Initial Public Offering. After that, shares trade between investors on stock exchanges.
How do you make money?
Two ways:
- Price appreciation — You buy at $100, it goes to $150, you sell for a $50 profit
- Dividends — Some companies pay shareholders a portion of their profits regularly, like quarterly rent checks
NVIDIA (NVDA) was worth about $4/share in 2016. By 2024 it reached $900/share. If you had bought 100 shares in 2016 for $400 total, they'd be worth $90,000. That's the power of owning a small piece of a company that grows.
Stock vs Bond
| Feature | Stock | Bond |
|---|---|---|
| What you own | Piece of company | Company debt |
| Return | Unlimited upside | Fixed interest |
| Risk | Higher | Lower |
| If company fails | Can lose everything | Paid before stockholders |
Most professional investors hold a mix of stocks AND bonds. Stocks for growth, bonds for stability. Your ratio depends on your age and risk tolerance.
New investors often think buying stock means the company gets their money. It doesn't — after the IPO, you're buying from other investors, not the company. The company already got paid at IPO.
Try it in Flash Candle
Run an Equity Screener on NVDA to see a real AI analysis of what you'd actually be buying into.
How Stock Markets Work
The stock market isn't one place — it's a network of exchanges, buyers, sellers, and rules that makes trading possible.
Exchanges — Where trades happen
Stock exchanges are organized marketplaces where buyers and sellers meet to trade shares. The two biggest in the US are:
- NYSE (New York Stock Exchange) — The largest. Home to companies like Coca-Cola, JPMorgan, Nike
- NASDAQ — Tech-heavy. Home to Apple, Microsoft, NVDA, Meta, Google
Markets are open Monday–Friday, 9:30am–4:00pm Eastern Time. Pre-market (4am–9:30am) and after-hours (4pm–8pm) trading also exists but with lower volume.
The bid price is what buyers will pay. The ask price is what sellers want. The difference is the spread. When you buy, you pay the ask. When you sell, you get the bid.
Market makers and liquidity
Market makers are firms that always stand ready to buy or sell a stock. They profit from the bid-ask spread and provide liquidity — meaning you can always find a buyer or seller for popular stocks.
SPY (S&P 500 ETF) trades over 80 million shares per day. This high liquidity means you can buy or sell instantly with a tiny spread — sometimes just $0.01. A thinly traded small-cap stock might have a $0.50 spread and take minutes to fill.
Indices — Tracking the market
A market index tracks a group of stocks to show overall market direction:
| Index | Tracks | Ticker |
|---|---|---|
| S&P 500 | 500 largest US companies | SPY |
| NASDAQ 100 | 100 largest NASDAQ stocks | QQQ |
| Dow Jones | 30 major US companies | DIA |
| Russell 2000 | 2000 small-cap companies | IWM |
Watch SPY and QQQ every morning. They tell you the mood of the overall market. Individual stocks almost always move with the broad market — if SPY is down 2%, most stocks will be down too.
Try it in Flash Candle
Run a Morning Briefing to see how the major indices are setting up before the market opens today.
Candlestick Charts Explained
Candlestick charts are the language of trading. Every chart you'll ever look at uses them. Here's how to read them instantly.
What a single candle tells you
Each candlestick represents one time period — one day, one hour, one minute depending on your chart setting. It shows you 4 pieces of information:
- Open — Where the price started that period
- Close — Where it ended
- High — The highest point reached
- Low — The lowest point reached
Bullish
Bearish
Green candle = Close is HIGHER than Open. Buyers won that period.
Red candle = Close is LOWER than Open. Sellers won that period.
Reading the wicks
The thin lines above and below the body are called wicks (or shadows). They show where price went but didn't hold.
- A long upper wick means buyers pushed price up but sellers drove it back down — bearish pressure
- A long lower wick means sellers drove price down but buyers stepped in — bullish pressure
A candle that opens at $100, shoots to $110 (upper wick), then closes at $102 tells you: buyers tried to push it higher but sellers stepped in hard at $110. That $110 level is now a resistance level to watch.
You don't need to memorize 50 candlestick patterns. Focus on just three: the long wick reversal, the engulfing candle, and the doji. Those three tell you 90% of what you need to know about momentum shifts.
Try it in Flash Candle
Open the Chart & Draw tool, pull up NVDA, and identify three candles with long wicks. What do they tell you?
P/E Ratio Explained
The Price-to-Earnings ratio is the single most used valuation metric in investing. Here's what it actually means and how to use it.
What is the P/E ratio?
The P/E ratio tells you how much investors are paying for each dollar of a company's earnings. It's the stock price divided by earnings per share (EPS).
If a stock trades at $100 and earns $5 per share, the P/E is 20. That means investors are paying $20 for every $1 of earnings.
P/E of 20 means: "At current earnings, it would take 20 years to earn back what you paid." Lower P/E = cheaper. Higher P/E = more expensive relative to earnings.
What's a "normal" P/E?
| P/E Range | What it means | Example |
|---|---|---|
| Under 10 | Very cheap — possibly a value trap | Banks, utilities |
| 10–20 | Fairly valued | Most mature companies |
| 20–40 | Growth premium | Apple, Microsoft |
| 40–100 | High growth expected | NVDA, Tesla |
| 100+ | Speculative — priced for perfection | Early stage growth |
NVDA trades at a P/E of ~65. Intel trades at a P/E of ~12. Does that mean NVDA is overpriced? Not necessarily. Investors pay a premium for NVDA because they expect massive earnings growth from AI demand. Intel is "cheaper" because growth is expected to be slow. Always compare P/E within the same industry.
Forward P/E vs Trailing P/E
Trailing P/E uses the last 12 months of actual earnings. Forward P/E uses analyst estimates for the next 12 months. Forward P/E is usually more useful for evaluating growth stocks.
Never evaluate P/E in isolation. A P/E of 30 might be cheap for a company growing 50% per year. Use the PEG ratio (P/E divided by growth rate) for a better comparison. PEG under 1 is generally considered undervalued.
Try it in Flash Candle
Run a Deep Fundamental Analysis on NVDA and look for the P/E ratio in the output. Is it justified by the growth rate?
Never Risk More Than 2%
The 2% rule is the most important rule in trading. It's what separates traders who survive from those who blow up their accounts.
What is the 2% rule?
Never risk more than 2% of your total account on any single trade. If you have a $10,000 account, you should never lose more than $200 on any one trade.
Even the best traders are wrong 40% of the time. The 2% rule means you can lose 10 trades in a row and only be down 20%. You survive to trade another day. Without this rule, one bad trade can wipe you out.
Position sizing with the 2% rule
The 2% rule tells you HOW MANY SHARES to buy, not just how much money to spend.
Account: $10,000 | Max risk: $200 (2%)
You want to buy NVDA at $890 with a stop loss at $870
Risk per share: $890 - $870 = $20
Shares to buy: $200 ÷ $20 = 10 shares
Total position: $8,900 — but you only RISK $200 if stopped out.
New traders think "position size" means how much money they put in. Wrong. Position size means how much they RISK — the distance to their stop loss multiplied by shares. You can put $8,900 into a trade and only risk $200 if you set the right stop.
Start with 1% risk until you're consistently profitable. Many professional traders never go above 1% even with large accounts. Preserving capital is always priority #1.
Try it in Flash Candle
Use the R:R Calculator to work out a properly sized position on any trade you're considering.
The 5-Step Research Workflow
This is the exact workflow professional traders use with Flash Candle. Run through these 5 tools in order and you'll never miss a critical factor.
Why a workflow matters
Most retail traders fail not because they're unintelligent — they fail because they're disorganized. They buy based on one piece of information and ignore everything else. The 5-step workflow forces you to look at a stock from every angle before committing capital.
The 5 Steps
What it gives you: Overall signal (Bull/Bear/Neutral), confidence score, 3-line summary
What to look for: Confidence 7+/10. If it's below 5, skip this stock.
Time: 30 seconds
What it gives you: Business quality, financials, catalysts, risks, valuation
What to look for: Revenue growth, margins, debt levels, upcoming catalysts
Time: 2 minutes
What it gives you: Trend, key levels, entry zone, invalidation
What to look for: Clear trend, defined entry, stop loss level no more than 5% away
Time: 1 minute
What it gives you: Where fundamental + technical + sentiment agree or conflict
What to look for: All 3 pillars aligned = highest confidence. Conflict = caution.
Time: 2 minutes
What it gives you: The 3 strongest arguments AGAINST your trade
What to look for: Are any of these deal-breakers? If yes, skip the trade.
Time: 1 minute
Never skip Step 5. The Devil's Advocate has saved more money than any other tool. It forces you to think about what could go wrong — and in trading, things always go wrong eventually.
Running only Step 1 and immediately placing a trade. That's like reading the headline of a news article and making a major life decision. All 5 steps together take less than 7 minutes. Always do all 5.
Put it into practice
Run the full 5-step workflow on NVDA right now. Follow each step in order. It takes 7 minutes.
Types of Orders
Market, limit, stop — knowing which order type to use can save you from costly mistakes and slippage.
Market Orders
A market order executes immediately at the best available price. Fast but no price guarantee — in fast markets you may pay more than expected.
Limit Orders
A limit order only executes at your specified price or better. You control the price but may not get filled if the stock never reaches it.
Stop Orders
A stop order triggers a market order when a price level is hit. Used to exit losing trades automatically. Set it and forget it — it protects you even when you're not watching.
Always use limit orders when entering a position. Use stop orders to protect it. Never use a market order in pre-market or after-hours when liquidity is low.
Try it in Flash Candle
Run a Price Action Scan on AAPL to find the ideal entry level and stop loss price.
Bull vs Bear Markets
Understanding market cycles is the difference between riding trends and fighting them.
Bull Markets
A bull market is a sustained period of rising prices — typically 20%+ gains from a low. Bull markets are driven by economic growth, low rates, and investor optimism. The average bull market lasts about 4 years.
Bear Markets
A bear market is a 20%+ decline from a recent high lasting at least 2 months. Driven by recessions, rising rates, or fear. The average bear market lasts about 10 months.
In a bull market, almost every strategy works. In a bear market, only capital preservation matters. Know which environment you're in before taking any position.
Support & Resistance
These are the most important price levels on any chart — where buyers and sellers repeatedly clash.
Support
Support is a price level where buyers keep showing up and preventing the stock from falling further. Think of it as a floor. When price drops to support and bounces, that's a potential buy signal.
Resistance
Resistance is a price level where sellers consistently appear and prevent the stock from rising further. Think of it as a ceiling. When price hits resistance and falls, that's a potential sell signal.
Old resistance becomes new support once broken. Old support becomes new resistance once broken. This is called role reversal and it's one of the most reliable patterns in technical analysis.
Round numbers ($100, $500, $1000) act as psychological support and resistance. NVDA at $900 is a key level simply because it's psychologically significant to traders.
Volume — What It Tells You
Price without volume is incomplete information. Volume is what confirms whether a move is real or fake.
Why volume matters
Volume is the number of shares traded in a given period. High volume means strong conviction — many traders agree on direction. Low volume means weak conviction — a move can easily reverse.
Price up on HIGH volume = strong bullish move. Price up on LOW volume = weak, likely to fade. Price down on HIGH volume = strong bearish move. Price down on LOW volume = weak selling, potential bounce coming.
Always look for volume confirmation on breakouts. A stock breaking above resistance on 3x average volume is a much stronger signal than one breaking on below-average volume.
Moving Averages
Moving averages smooth out price noise and reveal the underlying trend. They're the backbone of most trading strategies.
What is a moving average?
A moving average (MA) is the average closing price over a set number of days, updated each day. It creates a smooth line on your chart that shows trend direction.
| MA | Period | Used for |
|---|---|---|
| 20 MA | 20 days | Short-term trend |
| 50 MA | 50 days | Medium-term trend |
| 200 MA | 200 days | Long-term trend |
If a stock is above its 200-day MA, it's in a long-term uptrend. Below it — long-term downtrend. Professional fund managers watch the 200 MA on SPY as a key signal for overall market health.
Reading Earnings Reports
Earnings season moves stocks 10–30% in hours. Know what to look for before the report drops.
What is an earnings report?
Every quarter (3 months), public companies report their financial results. This is called the earnings report or 10-Q. It includes revenue, profit, guidance, and commentary from management.
What to focus on
- EPS vs Estimate — Did they beat or miss analyst expectations?
- Revenue vs Estimate — Revenue beat matters more than EPS beat
- Guidance — What management says about the NEXT quarter moves the stock more than current results
- Margins — Are profit margins expanding or contracting?
A company can beat on EPS AND revenue and still drop 10% if they lower guidance for next quarter. Always read the guidance section first.
Revenue vs Profit
These two numbers tell completely different stories. Confusing them is one of the most common beginner mistakes.
Revenue — The top line
Revenue is total money coming in before any expenses. Also called sales or turnover. A company can have $10 billion in revenue and still lose money.
Profit — The bottom line
Net profit (or net income) is what's left after ALL expenses — costs, salaries, taxes, interest. This is the "real" money the company made.
Amazon had $514B revenue in 2023 but only $30B net profit — a 5.8% margin. Apple had $383B revenue but $97B net profit — a 25% margin. Apple is far more profitable per dollar of revenue.
Software companies can have 70-80% profit margins. Grocery stores have 1-2%. Always compare margins within the same industry, never across different sectors.
What Is a Moat?
Warren Buffett's most famous concept. Companies with moats are worth far more than their current earnings suggest.
Economic moat
A moat is a sustainable competitive advantage that protects a company from competitors — like a moat protects a castle. Companies with wide moats can maintain high margins and market share for decades.
Types of moats
- Network effects — More users = more valuable (Meta, Visa)
- Switching costs — Too painful to leave (Salesforce, Adobe)
- Cost advantages — Can produce cheaper than anyone (Amazon, Walmart)
- Intangible assets — Patents, brands, licenses (Apple, Pfizer)
- Efficient scale — Market too small for competition (railroads, utilities)
Ask: "If a competitor had unlimited money, could they take this company's customers?" If yes — weak moat. If no — wide moat. NVDA's moat (CUDA ecosystem) is almost impossible to replicate even with unlimited capital.
Stop Losses — Your Safety Net
A stop loss is the most important order you'll ever place. It's the only thing standing between you and a catastrophic loss.
What is a stop loss?
A stop loss is an order that automatically sells your position if it drops to a specified price. You set it when you enter the trade and it protects you if you're wrong.
Set your stop loss BEFORE you enter a trade. Not after. Not when it's already dropping. Before. If you can't define where you're wrong before entering, you shouldn't enter.
Where to place your stop
Place stops at logical levels — below support, below the recent low, below a moving average. Never place them at round numbers where everyone else puts theirs.
The most dangerous words in trading: "I'll just give it a little more room." Moving your stop down when a trade goes against you is how small losses become account-wiping losses. Set it. Honor it. Always.
Risk/Reward Ratio
Only take trades where the potential reward is at least twice the potential risk. This single rule makes profitable trading possible even when you're wrong half the time.
The R:R Ratio
The Risk/Reward ratio compares how much you could lose versus how much you could gain on a trade.
A 3:1 R:R means you risk $100 to make $300. Even if you're only right 40% of the time, you're profitable.
| Win Rate | R:R Needed to Profit |
|---|---|
| 50% | 1:1 or better |
| 40% | 1.5:1 or better |
| 33% | 2:1 or better |
| 25% | 3:1 or better |
Never take a trade with less than 2:1 R:R. Professional traders aim for 3:1 or higher. Flash Candle's R:R Calculator shows you exactly where your target needs to be based on your entry and stop.
Portfolio Diversification
Don't put all your eggs in one basket — but don't spread so thin you can't monitor anything either.
Why diversify?
Diversification reduces the risk that one bad investment destroys your portfolio. When TSLA drops 30%, you want other positions that aren't correlated to protect your overall account.
How much diversification?
Most professional traders hold 5–15 positions. More than 20 and you can't track them all. Fewer than 5 and you're too concentrated.
Don't own 5 tech stocks and call it diversification. Spread across sectors: tech, healthcare, financials, energy, consumer. When tech sells off, other sectors often hold up.
Owning 50 stocks doesn't reduce risk much more than owning 15, but it creates massive management overhead. Studies show most diversification benefit is captured with just 12–15 uncorrelated positions.
How to Use Equity Screener
The Equity Screener is your first stop for any stock. Here's how to get maximum value from it in 30 seconds.
What Equity Screener does
It analyzes a stock from a professional analyst perspective and gives you a Bull/Bear/Neutral signal with a confidence score, key drivers, and risks. It's the fastest way to get an institutional-quality take on any ticker.
How to use it
- Type your ticker in the top field and press Set
- Click Equity Screener in the sidebar
- Read the signal and confidence score first
- Read the bull case and bear case
- Note the key risk — this is what to watch
If Equity Screener gives Confidence below 6/10 or a strong Bear signal, skip to the next ticker. Don't waste time on low-conviction setups. There are always better opportunities.
Reading Research Synthesis
Research Synthesis is Flash Candle's most powerful tool. Here's how to extract maximum insight from it.
What makes Synthesis different
Every other tool looks at one dimension — fundamental OR technical OR sentiment. Research Synthesis combines all three and shows you exactly where they agree (high confidence) and where they conflict (your key risk).
The Confidence Score
The 1–10 confidence score in Research Synthesis is the most reliable signal Flash Candle produces. Score of 8+ with all three pillars agreeing is a very high-conviction setup. Score of 5 or below means mixed signals — either wait or size very small.
Always read "Most Important to Verify" first. This is the single piece of information that could make or break the thesis. If it's an earnings report in 3 days, that changes your position size entirely.
Run Synthesis on the same stock weekly. Watch how the confidence score changes as new information comes in. A rising score over several weeks is a very bullish signal.
Devil's Advocate — Before You Trade
The final and most important step. Every trade you don't make because of Devil's Advocate is money you didn't lose.
Why Devil's Advocate exists
Human psychology makes us fall in love with trades we've already researched. We want to be right. Devil's Advocate forces an adversarial perspective — the 3 strongest reasons NOT to take the trade.
How to use it
Run it after you've completed Steps 1–4 and you're leaning toward entering a position. Read each argument carefully. Ask: "Is any of this a deal-breaker?" If yes — don't trade. If no — proceed with confidence.
The goal isn't to find reasons to avoid trades. The goal is to find trades where even the strongest counter-arguments are manageable. Those are your highest-conviction setups.
You now have the foundation to research any stock like a professional. The next step is practice. Run the full 5-step workflow on 3 different stocks this week — one you're bullish on, one you're bearish on, and one you're unsure about. The pattern recognition will develop fast.