Risk management for retail traders
The 1.5% per-trade guideline, position sizing math, and the difference between drawdown limits and drawdown discipline.
Every prop firm has drawdown rules. Almost no retail trader has equivalent rules in their own trading. That asymmetry is exactly why most retail traders fail to translate their personal results into a funded account.
The 1.5% rule, and why it exists
Coinhub Funded's per-trade risk guideline is "approximately 1.5% on a single trade idea." That number isn't arbitrary. It comes from a simple math problem: how many losing trades in a row can you have before you hit your max drawdown?
On a funded 2-Step account with 10% max DD:
- 1% risk per trade: 10 consecutive losses to blow up. Very unlikely.
- 1.5% risk per trade: ~6-7 consecutive losses. Unlikely but possible.
- 2% risk per trade: ~5 consecutive losses. Within normal statistical variance.
- 3% risk per trade: ~3 losses. Will happen.
The 1.5% guideline puts you in the zone where a normal losing streak is survivable but a pathological one (10+ losses in a row, which would suggest you're trading something other than your edge) breaches the rule.
The position sizing math
Position sizing is mechanical once you decide your risk per trade. The formula:
Position size = Account risk ÷ Distance to stop
If you have a $50,000 account, want to risk 1% ($500), and your stop is 0.5% below entry, your position size is $500 / 0.005 = $100,000 notional. With 1:50 FX leverage, that's $2,000 of margin used.
Most retail traders skip this math and instead use round-number lot sizes. "I'll do 0.5 lots." This is how you end up risking 4% on a trade with a wide stop and 0.3% on a trade with a tight stop. The risk per dollar varies wildly when the position size doesn't adjust to the stop distance.
| Stop distance | 1% risk position | What "0.5 lots" actually risks |
|---|---|---|
| 0.25% | $200K notional | ~0.125% |
| 0.5% | $100K notional | ~0.25% |
| 1.0% | $50K notional | ~0.5% |
| 2.0% | $25K notional | ~1.0% |
Use a calculator. Most platforms have one built in. Set your risk percentage once and let the platform compute the size for each trade.
Drawdown limits vs drawdown discipline
Coinhub Funded gives you a 4-5% daily drawdown limit on evaluation accounts and 3-5% on funded accounts. That doesn't mean you should be trading up to those limits.
Your personal drawdown discipline should be tighter than the rules. A common practice: define a "trading day stop" at 2-2.5% account drawdown, well inside the platform limit. When you hit that personal stop, you're done for the day, no matter what.
This does two things. First, it prevents the revenge-trading death spiral where you take three more trades after a loss trying to recover, and end the day at -4.5%. Second, it preserves your evaluation cushion for genuine market opportunities, not for recovery attempts.
- Personal daily stop: 2-2.5% (well inside the 4-5% rule)
- Personal weekly stop: 4-5% (closes the week if hit)
- Per-instrument stop: 3 losing trades in a row, stop trading that instrument for the day
- Post-payout caution: First 5 trades after a payout sized 25% smaller (recoup-the-payout phase is high-risk)
When to scale risk up
The corollary to defensive risk management: when do you size up?
The answer for most retail traders: more slowly than they instinctively want to. A common pattern: profitable week, scale up next week, lose more than you gained, scale back down. Net: nothing.
Better approach: scale risk based on your account equity, not your recent emotional state. If your equity is up 20% from starting balance, your 1.5% risk per trade is now 1.8% of the original balance. That's all the scaling you need. You don't need to manually increase risk percentage on top of that.
The exception: after extended winning periods (say, 3+ months of consistent profitability with low drawdown), modest risk increases (1.5% → 1.75% per trade) can be reasonable. But this is graduate-level discipline, not the place most retail traders should start.
The meta-lesson
Risk management for retail traders comes down to one thing: you have to lose like a professional before you can win like one. The losses are inevitable. What separates funded traders from washouts is how small the losses are when they come.
Every prop firm's rules are designed to keep you in the game long enough for your edge — if you have one — to show up in the results. If you can't make those rules work for you, the edge you think you have is probably illusory.
