Risk Management & Position Sizing
The single most important module on this site. Without this, no strategy survives long enough to pay off.
Lesson 1: Why Risk Management Comes First
Every trading strategy has losing streaks. A strategy with a 60% win rate can still produce 8 losses in a row over a long enough sample. If each loss costs you 25% of your account, you are broke before the winners show up.
Risk management answers one question: how do I survive long enough for my edge to play out?
The math is brutal and simple. Lose 50% of your account, and you need a 100% gain to get back to even. Lose 90%, and you need a 900% gain. The deeper the hole, the steeper the climb.
Beginners study entries. Professionals study survival. The traders who last 20 years are not the ones with the best setups — they are the ones who never blew up.
Lesson 2: Fixed-Percent Risk
The simplest, most durable rule in trading: risk a fixed percent of your account per trade, usually 1–2%.
If your account is $10,000 and you risk 1%, the most you can lose on any single trade is $100. To go broke, you would need 100 losing trades in a row — which is statistically near-impossible for any non-random strategy.
Why fixed percent and not a fixed dollar amount?
- If your account grows, your position size grows with it. You earn more when you are winning.
- If your account shrinks, your position size shrinks. You lose less when you are losing.
- It is automatic. You cannot "make it back" by doubling down.
This single rule turns a destructive strategy into a survivable one.
Lesson 3: Position Sizing Formula
Once you know your risk amount (1% of account) and your stop-loss distance, position size is just arithmetic:
Position size = Risk amount / (Entry price - Stop price)
Example:
- Account: $10,000
- Risk: 1% = $100
- Entry: $50
- Stop: $48 (so $2 of risk per share)
- Position size = $100 / $2 = 50 shares
The dollar value of the trade is 50 × $50 = $2,500 — but only $100 is at risk if your stop is hit. This is the difference between position size and risk. Beginners confuse the two and either trade too small (boring) or risk too much (bankrupting).
Use the Position Size Calculator on this site to do this automatically.
Lesson 4: Stop-Loss Placement
A stop-loss is the price at which your trade idea is wrong. Two rules:
- Place the stop where your setup is invalidated — not where you "can afford" to lose. If your stop is dictated by your account instead of the chart, you are not trading the market.
- Set the stop before you enter, not after. Once you are in a trade, you are emotional. You will find reasons to move the stop.
Common stop locations:
- Just below a swing low (longs) or just above a swing high (shorts).
- Below a major support level.
- Beyond an ATR-based volatility buffer (so noise does not stop you out).
Avoid mental stops ("I'll exit if it drops"). In the moment, you won't.
Lesson 5: Risk-Reward Ratio
The risk-reward ratio (RR) compares how much you risk to how much you stand to make. A 1:3 RR means you risk $1 to make $3.
The math that makes unprofitable-looking strategies profitable:
- A strategy with a 40% win rate and 1:2 RR is break-even before costs.
- A strategy with a 35% win rate and 1:3 RR is profitable.
Most beginners obsess over win rate and ignore RR. The truth: with good RR, you can be wrong 7 times out of 10 and still make money.
Set your target before you enter. If the chart does not offer at least 1:2 RR, skip the trade. There will be another one.
"Cut your losses and let your winners run" is the oldest advice in trading because it is the truest. The catch: it is psychologically painful, which is why most people cannot do it.