How Much Should You Risk Per Trade?

How much should you risk per trade?

Position sizing answers a single question before you ever click buy or sell: if this trade goes wrong, how much of my account am I willing to hand over to find out it was wrong? The most widely taught answer is the fixed-fractional rule, where you risk only a small, fixed percentage of your account on each trade. When people ask how much to risk per trade, this is the framework they usually mean.

As an illustration, many risk-management frameworks discuss risking something on the order of one to two percent per trade. The right figure depends on your circumstances and there is no universal number. This is educational information, not financial advice, and losses are likely for many traders regardless of how carefully a position is sized.

The decision that matters here is not which coin to trade. It is how much you stand to lose if the trade hits its stop-loss, expressed as a deliberate fraction of your capital rather than a number you reach by accident. Only ever risk what you can afford to lose.

• The percentage is the share of your account you are prepared to lose on one trade if it is wrong.
• It is decided in advance and kept consistent, not adjusted to how confident a particular trade feels.
• A smaller, steadier percentage trades faster account growth for a far better chance of surviving a bad run.

Risk amount versus position size: two different numbers

The percentage refers to the money you are prepared to lose if the trade is wrong, not the size of the position itself. Risking one percent of a five thousand dollar account means fifty dollars at stake if your stop-loss is hit, not buying fifty dollars of an asset.

The position you actually open is usually much larger than the amount you risk, because the stop-loss sits only a short distance from your entry. A single position can be worth many times your risk amount while still only putting that small risk amount in danger.

Keeping the loss small and fixed is the entire point, and it is what separates a planned trade from a guess. Confusing the two numbers is one of the most common ways beginners end up with positions far larger than they intended.

How to compute position size from your stop-loss

The amount you risk and the size of the position you open are two different numbers, and the bridge between them is the distance to your stop-loss. The closer your stop sits to your entry, the larger the position you can hold for the same fixed risk, because each unit can only move a little before the stop is hit. The further away your stop, the smaller the position must be.

The formula is straightforward: position size in units is the cash you are willing to risk divided by the distance from your entry to your stop-loss. Work out the risk amount first, then let the stop distance decide the size, never the other way around.

• Step 1: choose the percentage of your account to risk, then turn it into a cash amount.
• Step 2: measure the distance from your planned entry to your stop-loss.
• Step 3: divide the cash risk by the stop distance to get the position size in units.

A worked illustrative example

Suppose you have a five thousand dollar account and you have decided to risk one percent, which is fifty dollars. An asset trades at two thousand dollars and you plan to place your stop-loss at nineteen hundred, a distance of one hundred dollars per unit. Dividing the fifty dollars you are willing to risk by the one hundred dollar stop distance gives a position of half a unit.

That half-unit position is worth one thousand dollars at entry, but your actual risk is still only fifty dollars, because if the price falls to your stop you lose one hundred dollars per unit on half a unit. The thousand dollar position is simply the consequence of the maths, not a number you chose directly. These figures are illustrative only.

The same method shows why a tighter stop is not automatically safer. If you moved your stop to nineteen hundred and sixty, a distance of forty dollars, the same fifty dollar risk would now support a position of one and a quarter units, worth two thousand five hundred dollars. The cash you risk has not changed, but the position is far larger and more sensitive to a sudden move. Tighter stops let you hold more, which is precisely why they have to be placed where the trade is genuinely invalidated, not wherever makes the position feel comfortable.

Why fixed-fractional sizing protects you in a losing streak

A fixed-fractional approach means the cash you risk shrinks as your account shrinks, because the percentage is always taken from the current balance. After a loss the account is smaller, so the next one percent is a slightly smaller number, and the one after that smaller still. The losses compound downward gently instead of crashing through your capital in a straight line.

The contrast is stark when you compare it with risking a large, flat amount. As an illustration, five losing trades in a row at one percent of a ten thousand dollar account leave you with roughly nine thousand five hundred dollars, a drawdown under five percent that is uncomfortable but survivable. Risk ten percent of the account flat on each of those same five trades and you are down to five thousand dollars, having halved your capital on an ordinary run of bad luck.

The strategy was identical in both cases. Only the sizing changed, and the sizing decided whether the streak was a setback or a disaster. Because the percentage scales with the account, fixed-fractional sizing never lets a bad run deliver a single knockout blow, and it puts the brakes on at the worst moment, which is exactly when an account is most fragile and a trader is most tempted to size up to win it all back.

The link to risk of ruin

Risk of ruin is the probability that losses pile up far enough that the account can no longer realistically recover, and position size is the lever that moves it most. A genuinely good strategy can still be ruined by sizes that are too large, because a normal losing streak arrives before the edge has had time to show. Sizing small and consistently is what keeps the chance of that outcome low enough to keep trading. Our guide to risk of ruin in crypto trading goes deeper into why survival depends on sizing more than on accuracy.

This is also why the percentage you risk should be decided before you look at any signal or chart, when you are calm and nothing is on the line. A position size worked out in the heat of a fast-moving market is the one most likely to be too big. The rule exists to remove that decision from the moment when you are least able to make it well. None of this guarantees a profit, and past performance does not guarantee future results.

Sizing, stop-losses and reading a signal

A position size is only as honest as the stop-loss it is built on. If the stop is placed at a level the trade can reach in normal trading and still be considered wrong, the maths protects you. If it is jammed unnaturally close just to justify a bigger position, you have not reduced your risk; you have only made it more likely the stop is hit by ordinary noise.

This is where position sizing connects to risk-reward: the same stop distance that sets your size also sets the risk side of your risk-reward ratio, so the two have to be planned together rather than reverse-engineered to fit a trade you already want to take.

It also explains a common gap in crypto signal channels. A call that names an entry and a target but says nothing about how much of your account to risk has left out the single factor most likely to decide whether you are still trading next year. A signal cannot size a position for you, because only you know your account and what you can afford to lose. Treat the absence of any discussion of sizing as a sign the call is incomplete, not as permission to risk whatever the position happens to cost.