Strip away every indicator, every strategy, every market opinion, and risk management is what's actually left standing between a trader who survives long enough to become consistently profitable and one who doesn't. It comes down to three rules — genuinely simple to state, and consistently the hardest thing for traders to actually follow.
1 Risk a Fixed, Small Percentage Per Trade
Never risk more than a small, consistent percentage of your account on any single trade — typically 0.3% to 1%, depending on your strategy and how much drawdown you're prepared to withstand. This single rule is what determines whether a losing streak is a minor setback or the end of an account.
| Risk Per Trade | Consecutive Losses to Reach 20% Drawdown |
|---|---|
| 2% | ~10 losses |
| 1% | ~20 losses |
| 0.3% | ~65 losses |
Simplified illustration assuming a fixed £ risk per trade — actual sequences vary with win rate and compounding effects, but the relationship holds: lower risk per trade dramatically increases how many losses an account can absorb.
2 Always Use a Stop Loss — And Respect It
A stop loss only works as risk management if it's honoured. Moving a stop further away because a trade "will probably come back" isn't managing the trade — it's abandoning the risk management decision you made calmly, before you were emotionally invested in the outcome. The stop is the rule; the moment you're tempted to move it is exactly when it matters most.
3 Maintain a Positive Risk:Reward Ratio
Your average reward should be meaningfully larger than your average risk — 1:1.5 or better is a reasonable baseline, with 1:1.8 or higher giving you real margin. A good R:R ratio means you don't need an unrealistically high win rate to be consistently profitable; a mediocre one means even a decent strategy struggles to produce a positive expectancy.
Why This Matters Specifically for Prop Firm Challenges
Prop firm challenges apply hard drawdown limits on top of everything above — typically 10% maximum drawdown from the starting balance. That makes Rule 1 the single most important variable in whether a challenge survives a normal losing streak or ends because of one.
Position Sizing, Leverage, and Margin
These three rules govern your risk %, but translating that % into an actual stake — especially on a leveraged product — has its own mechanics worth understanding: how leverage affects your exposure, what margin requirements mean for your account, and why position size and stop distance have to be considered together, not separately. We've covered that in detail in a separate post.
→ IG Academy: Understanding Leverage and Margin
How the Formula Applies These Rules Automatically
- Position Sizer — enforces Rule 1 precisely, calculating the exact stake that keeps you at your chosen risk % for any stop distance
- Drawdown Defender — runs infinite Monte Carlo simulations to show exactly how many consecutive losses your Rule 1 setting can survive, specific to your own parameters
- TEF Simulator — helps you set a realistic Rule 3 target R:R, and shows the win rate it actually requires
The three rules are simple to state. Following them consistently, especially under pressure, is where a systematic framework earns its keep — it makes the disciplined choice the default one, rather than something you have to enforce on yourself mid-trade.
Further reading: IG Academy has free structured courses covering risk management fundamentals in more depth.
Put These Rules Into Practice, Automatically
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Risk Warning: Spread bets and CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 69% of retail investor accounts lose money when trading spread bets and CFDs with IG. Prop firm challenge terms, drawdown limits, and rules vary by provider — always check current terms before attempting a challenge.