Position Sizing in Crypto: How to Size Every Trade

Position size in crypto comes from three numbers: how much you are willing to lose on the trade, where your stop sits, and the entry price. The formula is position size = (account size × risk per trade) ÷ stop distance. Set the stop where your trade idea is proven wrong, decide the dollar loss you accept there, and the number of coins follows. You never pick a size by feel.

Below you will find the formula with worked examples, how to choose a risk percentage, how risk-reward and win rate fit together, and how leverage, fees and slippage change the result.

TL;DR

• Position size = (account × risk %) ÷ (entry − stop). Risk is the dollar loss if your stop is hit, not the size of the position.
• Most traders keep risk per trade at 1% to 2% of the account. A long losing streak then stays survivable.
• Leverage changes the margin you post, not the loss at your stop. Fees and slippage make that loss bigger, so build them into the formula.
• A 1:2 risk-reward ratio breaks even at a 33% win rate, and 1:3 at 25%, before fees.
• Write the numbers down before you enter. If you cannot name your stop, you cannot size the trade.

Table of Contents

• What position sizing actually decides
• The position sizing formula, step by step
• How much to risk per trade
• Risk-reward and win rate: the other half
• Leverage changes margin, not the loss at your stop
• Fees and slippage: the costs that grow your loss
• Three ways to size positions
• Perspective: why we build around liquid markets
• Common sizing mistakes
• A repeatable pre-trade checklist
• Put your sizing into practice on Coindivo
• FAQ
• Sources

What position sizing actually decides

Position sizing is the process of deciding how many coins to buy or sell on one trade. It sounds like a detail. In practice it is the lever that controls how much any single idea can hurt you.

Two traders can take the same entry and the same stop on the same coin. If one buys $500 worth and the other buys $5,000 worth, they have made two very different bets. Same chart, same signal, a tenfold difference in the damage a wrong call does.

That is why sizing is separate from strategy. Your entry method decides when to trade. Your sizing decides how much it can cost you to be wrong. Crypto makes this matter more, because the market trades around the clock and moves fast. The U.S. Commodity Futures Trading Commission notes that virtual currencies are more volatile than traditional fiat currencies, and that profits and losses are amplified in margined futures contracts. A fixed rule for size is how you keep that volatility from making decisions for you.

The position sizing formula, step by step

Here is the whole method in four steps.

1. Set your risk amount. Account size × risk percentage. On a $10,000 account at 1%, that is $100.
2. Pick your stop price. Place it where the trade idea is invalid, such as just below a support level or a breakout level that failed. Do not place it where the loss “feels” acceptable.
3. Measure the stop distance. Entry price minus stop price, per coin.
4. Divide. Risk amount ÷ stop distance = number of coins.

A worked example

You have $10,000 and risk 1% per trade. A coin trades at $100 and your stop is $92.

• Risk amount: $10,000 × 1% = $100
• Stop distance: $100 − $92 = $8
• Position size: $100 ÷ $8 = 12.5 coins
• Position value: 12.5 × $100 = $1,250, which is 12.5% of the account

If the stop is hit, you lose 12.5 × $8 = $100. That is exactly 1% of the account, no matter that the position itself is 12.5% of your capital.

Now widen the stop to $85, a $15 distance. The same $100 risk gives 6.67 coins, a $667 position. A wider stop means a smaller position. A tighter stop allows a bigger one. The risk stays $100 either way, and this is the point most beginners miss: the dollar risk is fixed first, and the size adjusts to it.

The same math in percentages

If you think in percent moves, there is a shortcut. Position value = risk amount ÷ stop distance as a percentage of entry. With $100 at risk and an 8% stop, the position is $100 ÷ 0.08 = $1,250. With a 2% stop it is $5,000. You will use this version most often when you trade from a chart.

Position size is not risk

A $5,000 position can be safe, and a $500 position can be reckless. Risk is the amount lost if the stop is hit. A $5,000 position with a 2% stop risks $100. A $500 position with no stop and a coin that can drop 60% risks $300 and rising. Size alone tells you nothing until you know the stop.

How much to risk per trade

The common guideline is to risk 1% to 2% of your trading capital on any single trade. Educators in the trading space describe 1% to 2% as the typical range for professionals, and the logic is arithmetic, not folklore.

Here is what ten consecutive losing trades do to a $10,000 account at different risk levels. Each loss takes a percentage of what is left.

Ten losses in a row is not exotic. Any strategy with a 50% win rate will produce a streak like that eventually over enough trades. At 1% you are down less than a tenth and can keep trading with a clear head. At 10% you are down nearly two thirds and your next decisions will be driven by the need to win it back.

Why recovery gets harder than the loss

Losses and gains are not symmetrical. A 10% drawdown needs an 11.1% gain to get back to even. A 50% drawdown needs a 100% gain. A 65% drawdown needs about 186%. Small risk per trade keeps you in the zone where recovery is realistic.

Choosing between 1%, 2% and something smaller

• Under about $1,000 or still learning: start at 0.5% to 1%. The goal is data on your own behavior, not income.
• A tested setup you have traded for months: 1% to 2% is reasonable.
• Several open positions at once: remember that crypto coins tend to move together in sharp sell-offs. Three positions each risking 1% can behave like one position risking 3%. Cap your total open risk, for example at 3% to 5% of the account.

There is no universal right number. The right number is the one you can lose ten times in a row without changing how you trade.

Risk-reward and win rate: the other half

The risk-reward ratio compares how far your target is from entry with how far your stop is. The formula is (target − entry) ÷ (entry − stop). If your stop is $8 away and your target is $16 away, the ratio is 1:2. You risk one unit to make two.

The ratio is not a verdict on its own. It only works together with how often you win. The break-even win rate is 1 ÷ (1 + reward multiple):

Expectancy in one line

Expectancy tells you what an average trade is worth: (win rate × average win) − (loss rate × average loss). Suppose you win 40% of the time with a 1:2 setup and risk $100 per trade.

• Wins: 0.40 × $200 = $80
• Losses: 0.60 × $100 = $60
• Expectancy: +$20 per trade, or +0.2R, where R is your risk unit

That is positive, but thin. Fees and slippage can erase it, which is why the next section matters. Measuring results in R (multiples of your risk) rather than dollars also lets you compare trades of different sizes honestly.

Do not stretch targets to make the math look good

A 1:5 ratio looks great on paper, but if the target sits where price rarely goes, your win rate collapses. Place targets at levels the chart supports, then check whether the ratio is acceptable. If it is below about 1:1.5 for your setup, skip the trade rather than shrinking your stop to flatter the ratio.

Leverage changes margin, not the loss at your stop

Leverage is the most misunderstood part of sizing. It lets you control a larger position with less of your own money posted as margin. It does not change the loss you take when your stop is hit. That loss is set by position size and stop distance.

Take a $10,000 account risking 1% ($100) on BTC at $70,000, with a stop at $68,600, which is 2% below entry.

• Position value: $100 ÷ 0.02 = $5,000 (about 0.0714 BTC)
• At 5x leverage, margin posted: $1,000
• At 10x leverage, margin posted: $500
• Loss at the stop in both cases: $100

The risk is identical. What changes is how much of your account is tied up and how close your liquidation price sits. At higher leverage, liquidation moves closer to entry. If liquidation can trigger before your stop, you no longer control your loss. Always check that the liquidation price sits well beyond the stop, with room for a fast move.

The mistake to avoid is the reverse: using leverage to buy a bigger position than your formula allows because “the margin is small.” A 10x position sized for 10% account risk is still a 10% account risk. The CFTC’s advisory on virtual currency trading is explicit that leveraged, margined trading amplifies gains and losses, so the formula, not the leverage setting, should set your size.

To see how we describe the risks of trading and holding on our platform, read our risks and how it works page.

Fees and slippage: the costs that grow your loss

The basic formula assumes you exit exactly at your stop and pay nothing. Real trades do not work that way. Fees apply on entry and exit, and a fast market can fill your stop beyond the price you set (slippage). Both make the loss at the stop larger than your plan.

The fee-adjusted formula adds these costs to the stop distance:

Position size = amount at risk ÷ (stop distance + entry fee + exit fee + slippage allowance)

All terms are expressed as a percentage of position value.

Worked example with a swap fee

Suppose you swap into a coin and plan to swap out. A swap fee of 0.5% each way is 1% round trip. Our own swap fee is 0.5%, so this is a realistic way to model an on-chain swap trade.

• Account: $10,000, risk 1% = $100
• Stop distance: 8%
• Fees: 0.5% in + 0.5% out = 1%
• Slippage allowance: 0.3%
• Total cost basis: 8% + 1% + 0.3% = 9.3%
• Position size: $100 ÷ 0.093 = about $1,075

Compare that with $1,250 from the no-fee version. The fee-adjusted position is about 14% smaller, and if the stop is hit the total loss, fees included, stays at $100. Skip the adjustment and you would lose roughly $116 instead of $100.

This is also why tight stops on small moves are expensive. With a 1% stop and 1% round-trip fees, half of your risk budget goes to costs before price moves a tick. Wider stops with proportionally smaller positions spend less of your budget on fees.

On-chain trades add network costs on top. Our guide to gas fees in crypto explains what they cost and how to keep them down. Include them in your cost basis for small positions, where a flat fee is a big percentage.

Three ways to size positions

Once the formula is clear, there are a few methods for choosing the risk amount itself.

Fixed percentage

You risk the same percentage of current equity each trade, such as 1%. Dollar risk shrinks after losses and grows after wins. This is the method used in the examples above, and for most traders it is the right default because it protects the account during a bad run.

Fixed dollar amount

You risk the same dollar amount, say $100, on every trade. It is simple to track. The downside is that it does not adapt, so after a drawdown the same $100 is a bigger share of what is left. If you use it, review the amount monthly.

Volatility-based sizing

Here the stop distance comes from a volatility measure such as the 14-period average true range (ATR) rather than a chart level. A common approach is to place the stop at one to two ATRs from entry. Volatile coins then get wider stops and smaller positions, and calm coins get tighter stops and larger ones. It keeps risk consistent across coins that behave very differently.

Whatever method you choose, apply it the same way every time. Consistency is worth more than a clever formula you abandon after two losses.

Perspective: why we build around liquid markets

We built Coindivo for traders who size trades before they enter them, so we think about the sizing problem from the market side as well as the account side.

A stop only protects you if the market lets you exit near it. Thin, unstable markets are where slippage grows and where a stop price is more of a hope than a plan. That is why we restrict trading to the top 1,000 coins by market cap and filter out illiquid and unstable assets. We want the numbers in your formula, the stop distance and the slippage allowance, to be believable ones.

Our signals are built around live momentum, and for automated trading our approach is to confirm a signal on live major exchanges before a trade executes. Momentum gives you a reason to enter. Your sizing rule decides how much that reason is allowed to cost you. We see the two as a pair: a clear entry, a defined stop, a fixed risk.

You also keep custody of your funds in your own wallet, which means the account balance you size from is yours, not an IOU. You can trade manually and apply your own sizing to every entry, or let signal-based automation work for you. For how momentum signals are read, see our guide to momentum trading in crypto.

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Common sizing mistakes

Sizing from a feeling. Confidence is not a number. If you size up because a setup “looks great,” you are betting hardest when you are most likely overconfident. The size should come from the stop, and a vague stop makes any size meaningless.

Moving the stop after entry. If you widen a stop to avoid being hit and leave the position unchanged, you have raised your risk above the plan. Widening a stop is only consistent with your rules if you cut the position at the same time.

Ignoring correlated positions. Holding five altcoins that all follow BTC is closer to one large position than five small ones. Count them together.

Doubling down to recover. After a loss, the pull is to bet bigger. That is the path to the 65% drawdown in the table above. Hold your percentage constant, or cut it, after losses.

Using leverage as a size dial. Pick leverage to keep liquidation far from your stop, then let the formula set the size.

Skipping fees on small accounts. On a $500 account, fixed costs are a large share of every trade. Fee-adjust the formula or trade less often with better setups.

Forgetting the exit plan. Sizing covers the loss side. Know in advance whether you take profit at a target, scale out, or trail a stop. The breakout approach in our practical guide to breakout trading shows how stops and targets fit around a defined level.

A repeatable pre-trade checklist

Before every entry, write down these lines. Fill them in the same order each time.

1. Account equity today: $____
2. Risk percentage: % = $
3. Entry: ____ Stop: ____ Target: ____
4. Stop distance as a percent of entry: ____%
5. Fees, slippage and network cost allowance: ____%
6. Position size = risk $ ÷ (stop % + costs %) = $____
7. Risk-reward ratio: 1:____ and break-even win rate: ____%
8. Liquidation price (if leveraged) is beyond the stop: yes / no
9. Total open risk across all positions: ____% of account

If you cannot fill one line, you are not ready to enter. That is the check working, not a problem with it.

Practice the routine before you put real money behind it. Our guide to paper trading crypto shows how to rehearse sizing and journaling without risking capital. And if you are leaning on automation, our piece on AI trading in crypto covers what automated tools do and where your own risk rules still apply.

Put your sizing into practice on Coindivo

Once your numbers are written down, you need a place to act on them with full control of your funds. Coindivo gives you a virtual wallet at $0 per month, live momentum signals, manual and automated trading, and on-chain swaps at a 0.5% swap fee, all focused on the top 1,000 coins by market cap. Alerts can reach you through Telegram, so a signal does not have to find you at your desk.

Set your risk, size the trade, then open Coindivo to trade it your way. If you want to see how pre-sale participation works, our Launchpad is the place to look, and the same discipline applies: decide the amount you can afford to lose first.

FAQ

How do I calculate position size in crypto?

Divide the dollar amount you are willing to lose by the distance between your entry and your stop. With a $10,000 account, 1% risk ($100), and a $8 stop distance, you buy 12.5 coins. Add fees and slippage to the stop distance for a more accurate size.

What is a good risk per trade in crypto?

Most traders stay between 1% and 2% of their account on each trade. If you are new or your account is small, 0.5% to 1% gives you room to learn. Choose a number you could lose ten times in a row without changing how you trade.

What is a good risk-reward ratio for crypto?

Many traders look for at least 1:2, which breaks even at a 33% win rate before fees. The right ratio depends on how often your setup wins, so judge it with expectancy, not the ratio alone. Set targets at levels the chart supports rather than stretching them.

Does leverage change my position size?

Leverage changes how much margin you post, not the loss at your stop. Size the position from your risk amount and stop distance first, then pick leverage so your liquidation price sits well beyond the stop. Using leverage to hold a larger position than your formula allows raises your real risk.

Should I include fees in my position size?

Yes. Add entry fee, exit fee and a slippage allowance to your stop distance before dividing. On a $100 risk with an 8% stop, 1% round-trip fees and 0.3% slippage, the position drops from $1,250 to about $1,075 so your loss at the stop stays at $100.

Sources

• CFTC Customer Advisory: Understand the Risks of Virtual Currency Trading
• Position Sizing Guide: The 1% Rule and Kelly (Tradingsim)

Recommended

• Breakout Trading in Crypto: A Practical Guide
• Momentum Trading in Crypto: How It Works and Where It Fails