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Read, reflect, then practise on demo. Take one useful idea into your next journal entry.
Ask a new trader how they manage risk and the answer is usually 'I always use a stop' or 'I keep my trades small'. Neither is a rule. A stop parked wherever the pound figure feels bearable, on a position sized by instinct, is a guess with an order attached, and an ordinary run of red entries will expose it within weeks.
By the end of this you will be able to size any demo position from its stop in under a minute, set limits that stop a bad session becoming a bad month, spot two open positions that are secretly one, and see why investing's diversification advice does not carry over to short-term trading.
The one number you control
Once you click, almost nothing about a trade is yours to decide. One number is, and you set it before the order exists: what this entry costs if you are wrong. Risk management is the written rules that fix that number, starting with the 1% cap. Every demo position is sized so that if the stop is hit, the account falls by no more than one percent of its current balance. On a £10,000 demo account that is £100. Not £100 on the setups you like and £300 on the ones you love. £100, every time.
The 1% cap at true scale
Why so small? Because red entries arrive in runs. If exactly half your entries go green and each is independent of the last, the arithmetic says a streak of eight red entries somewhere in 500 is more likely than not, and a streak of six is close to certain. That is not a broken strategy. That is a coin behaving like a coin, and the cap decides what the streak does to you.
| Red entries in a row | At the 1% cap | At a 2% cap | At a 5% cap |
|---|---|---|---|
| 5 | 95.1% left, needs +5.2% | 90.4% left, needs +10.6% | 77.4% left, needs +29.2% |
| 10 | 90.4% left, needs +10.6% | 81.7% left, needs +22.4% | 59.9% left, needs +67.0% |
| 20 | 81.8% left, needs +22.3% | 66.8% left, needs +49.8% | 35.8% left, needs +179.0% |
Read the bottom-right cell twice. At a 5% cap, twenty red entries leave about a third of the account, which then has to nearly triple. At the 1% cap the same streak is a bad month you can study. The cap will not make you better at picking entries. It keeps you here until you are.
Size comes from the stop, never the other way round
Most beginners pick a size first, then put the stop wherever that size produces a bearable figure. The stop lands inside ordinary price movement, noise takes it out, and the analysis gets the blame. The correct order starts on the chart. The stop goes where the idea is proven wrong, beyond the level or swing that made the entry worth taking, measured in pips before you enter. Then the size follows: a wide stop means a small position, a tight stop a larger one, and the money at stake stays fixed.
Sizing a demo position in four steps
Write the cap in money
One percent of the current demo balance, not the starting one: £100 on £10,000, then £96 once a red week leaves £9,600. The cap shrinks as the account does, which slows a bad run down.
Measure the stop distance in pips
From the planned entry to where the idea is wrong, plus a small allowance for the spread. Measure it before the order ticket is open, so the chart sets the number, not your mood.
Find the pip value for this pair
Your platform shows it per lot. On a pair quoted in your account currency it is fixed: one pip on a standard lot of EUR/GBP is £10 for a pound account. Other pairs convert at the current rate, so use the platform's figure.
Divide, then round down
Lots equal the cap divided by the stop in pips times the pip value per lot. If the answer is 0.38, trade 0.38 or less, never 0.5 because it looks tidier. Rounding that up is how a 1% cap quietly becomes 1.3%.
Educational example · demo account, illustrative figures
One account, three stops, the same £100
A £10,000 demo, so the cap is £100. The first setup is on EUR/GBP and the chart puts the stop 20 pips from the planned entry. A standard lot is worth £10 a pip, so £100 divided by 20 pips is £5 a pip: 0.5 lots.
Next day, same pair, but the structure is wider and the stop has to sit 40 pips away. £100 divided by 40 pips is £2.50 a pip: 0.25 lots. The stop doubled, the position halved, and the money at stake did not move.
The third setup is on GBP/USD, where a standard lot is worth $10 a pip. Assume, purely for the sum, a rate of 1.2500, which makes that £8 a pip. With a 25-pip stop that is £200 a lot, so £100 buys 0.5 lots.
Illustrative demo arithmetic. The GBP/USD rate is an assumption, not a price, and spread and commission shift every figure slightly.
Two stop rules sit alongside the sizing. A stop may move towards the target under a written rule, never further from the entry, because widening it changes the cost of a trade you already agreed to. And the stop order, labelled stop-loss on most platforms, is an instruction, not a guarantee: in a fast market or over a weekend gap, price can jump past it and fill at the next available price, so the realised loss can be larger than planned. That argues for a small cap, not for skipping the stop.
In the UK, the FCA's 2019 rules for retail clients trading CFDs (policy statement PS19/18) require margin of at least 3.33% of a position's value on major currency pairs, which is leverage of 30:1, and 5% on minor pairs, which is 20:1. Leverage sets how big a position you may open, not how big you should. Size from the stop and the cap and at ordinary stop distances, it becomes a ceiling you rarely get near. Overleveraging is oversizing by another name.
Daily and weekly limits: where a bad session ends
The 1% cap protects one entry. It does nothing to stop six in an afternoon, and by the third red entry the waiting is usually shorter and the size creeping up. Revenge trading is covered in its own lesson. The point here is that a written limit decides when you stop, so your mood does not.
| Limit | Example setting | When it is hit |
|---|---|---|
| Per session | Two red entries | Platform closed until tomorrow, one journal line per entry |
| Per week | Four red entries, or the demo balance down 4% | No new entries until the weekly review |
| Open at once | 1% in total across positions on the same idea | Skip the second correlated entry, or split the cap |
Treat these limits as real on demo. A record where the daily limit was ignored 'because it is only demo' describes somebody other than the trader who turns up when something is at stake. And if a prop-firm evaluation comes later, many of those firms enforce daily drawdown limits of their own; yours should sit well inside theirs.
Correlation: when two positions are secretly one
Here is how to break the 1% cap without breaking it on any single position. You go long EUR/USD at the cap. Twenty minutes later GBP/USD looks similar, so you go long that at the cap too. Every rule followed. But both are priced against the dollar, one US data release can move them together, and what you hold is closer to a single 2% position on the dollar weakening.
Correlation between pairs drifts over months, so any precise figure soon goes stale. What you need is a habit: for every open position, write down which currency you are effectively buying and which you are selling.
- Long EUR/USD means buying euros and selling dollars.
- Long GBP/USD means buying pounds and selling dollars. Same side of the dollar as the first.
- Short USD/JPY means selling dollars and buying yen. Same side again.
- Short EUR/USD and long USD/CHF both mean buying dollars. Two tickets, one view.
Three positions that all sell dollars are one dollar position wearing three labels. Count them as one exposure against the cap: take the clearest and leave the rest, or split the 1% between them. Taking one is the habit worth practising first.
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Watch the free webinarWhy investing's diversification advice does not transfer
Investing teaches you to spread money across many assets so no single failure sinks you. For a portfolio of different businesses held for years, that is sound advice. Bring it to short-term forex and it quietly turns into something else.
The instruments overlap: most major pairs contain the dollar, so trading seven of them is mostly seven ways of holding one view. And a short-term trader's edge, if there is one, lives in a repeated behaviour on one setup, which eight pairs dilute. What smooths a short-term record is the number of independent, capped entries. Concentrate your instruments and diversify across entries: one or two pairs, one setup, the cap on every position, and a few hundred repetitions before you judge any of it.
- What is the 1% rule in forex?
- It is what we teach as the 1% cap: size every demo position so that if the stop is hit, the account falls by no more than one percent of its current balance. Ten red entries in a row then leave about 90% of the account. At 5% per entry the same run leaves about 60%, which needs a 67% gain to get back.
- How do I calculate position size in forex?
- Divide the cap in money by the stop distance in pips multiplied by the pip value per lot. On a £10,000 demo account, a 20-pip stop on EUR/GBP gives £100 divided by 20 pips, or £5 a pip, which is 0.5 lots. Measure the stop on the chart first, and round the size down.
- What is a good risk-to-reward ratio in forex?
- There is no universally good one, because the ratio and the strike rate trade off. At 1:1 you need half your entries green just to break even before costs, and more once costs are counted; at 1:2, a third. Use the ratio your strategy defines, fixed before entry, and judge it on a large demo sample.
- Does leverage increase risk in forex?
- Leverage sets the largest position you may open; your size and stop decide what an entry can cost. Under FCA rules made permanent in 2019, UK retail CFD clients are limited to 30:1 on major currency pairs. Size from the stop under the 1% cap and you will use a small fraction of that.
What to take away
- The 1% cap: size every demo position so the stop costs no more than one percent of the current balance.
- Streaks of red entries are ordinary arithmetic. The cap decides whether a streak is a bad month or the end of the account.
- Stop first, size second. The chart decides where the idea is wrong; the cap decides how big the position can be.
- Write daily and weekly limits as numbers with consequences, and keep them on demo as if they were real.
- Positions that buy or sell the same currency are one exposure. Count them once against the cap.
- In short-term trading, diversify across many capped entries, not across many pairs.
Risk management will never turn a weak strategy into a good one, and it is not meant to. Its job is to make sure no handful of entries can decide your future, so the strategy gets the few hundred repetitions it needs to show you what it is. Keep every entry small enough to be boring.
The honest caveat
Educational content, not financial advice. Every worked figure above is illustrative and demo-framed, including the assumed exchange rate. Practise on a demo account first; our programme trades demo. Stops do not guarantee the price you get, trading involves significant risk, results are never guaranteed, and every result we publish is an individual outcome shared with permission.
The Traderess coaching team
Written the way we coach — direct, structured, no shortcuts.