BULLSTAR 
Most traders who blow up their accounts don't lose because their analysis is terrible. They lose because one or two trades were simply too big. A good setup with the wrong position size can still wipe out weeks of progress.
The question "how much should I risk per trade?" has a clear, practical answer, and once you understand it, you will never size a trade by feel again. This guide explains the rule most professional traders use, how to turn your stop loss into an exact position size, where leverage really fits in, and it includes a free calculator so you can do the math in seconds.
Free Crypto Position Size Calculator
Enter your account balance, how much you want to risk, your entry and your stop loss. The calculator shows the position size that loses exactly your chosen amount if the stop loss is hit, plus the margin you need at your leverage. It works for both longs and shorts: a stop below the entry is a long, a stop above the entry is a short.
Results are approximate. Exchange fees, funding and slippage are not included, and real liquidation prices also depend on your exchange's maintenance margin, so always keep a buffer.
The Short Answer: Risk 1% to 2% Per Trade
Most experienced traders risk between 1% and 2% of their account on a single trade. On a $1,000 account, that means a trade that hits its stop loss costs you $10 to $20, not $100 or $300.
"Risk" here means the amount you lose if the stop loss is hit. It is not the size of your position and it is not the margin you put up. That difference is the key to everything else in this guide.
A simple guideline by experience:
- Beginners: 0.5% to 1% per trade while you learn
- Consistent traders: 1% to 2% per trade
- Above 3%: aggressive. Only for traders with a long, proven record, and even then rarely
Why Risk Per Trade Matters More Than Win Rate
Every trader has losing streaks, even with good signals. Ten losses in a row sounds extreme, but over hundreds of trades it can happen. Here is what such a streak does to your account depending on your risk per trade:
| Risk per trade | Account after 10 losses | Gain needed to recover |
|---|---|---|
| 1% | -9.6% | +10.6% |
| 2% | -18.3% | +22.4% |
| 5% | -40.1% | +67.0% |
| 10% | -65.1% | +186.8% |
At 1% risk, a terrible streak is an annoying dip you can recover from. At 10% risk, the same streak leaves you needing to almost triple what's left just to get back to where you started. This is why professionals obsess over risk per trade: it decides whether you survive the bad periods long enough to profit from the good ones.
Risk Is Not Position Size: The Formula
Here is where most beginners go wrong. They decide "I'll put $100 into this trade" without looking at where the stop loss is. The right way works backwards from the stop loss:
Step by step, with an example:
- Risk amount: $1,000 account x 1% = $10
- Stop loss distance: entry at 100, stop loss at 95, so the distance is 5%
- Position size: $10 ÷ 0.05 = $200
If price drops to your stop loss, a $200 position loses 5%, which is exactly $10, or 1% of your account. The trade can be right or wrong, and either way the damage is controlled.
Now notice what happens with a tighter stop. If the stop loss is only 2% away, the same $10 risk allows a $500 position. A wider stop means a smaller position, a tighter stop means a larger one. The risk in dollars stays the same.
Where Leverage Fits In
Leverage doesn't change how much you risk. It only changes how much margin you need to open the position.
In the example above, the $200 position needs $200 of margin at 1x, $20 at 10x and $10 at 20x. If the stop loss is hit, you still lose $10 in all three cases. Leverage simply lets you keep less money locked in the trade.
There is one important limit: your liquidation price must be further away than your stop loss. On isolated margin, a position is liquidated after a move of roughly 100% divided by your leverage:
- 10x: liquidation after a move of about 10%
- 20x: about 5%
- 50x: about 2%
With a 5% stop loss, 20x is already too much, because the position would be liquidated around the same place your stop sits, and in practice slightly before it. The calculator above warns you when this happens. Our guide leverage explained: 10x vs 75x goes deeper, and the stop loss secret behind high win rates explains why cross margin makes this even more dangerous.
Risk-Reward and the Win Rate You Need
Risk per trade controls how much you lose. The risk-reward ratio decides whether your wins are big enough to make up for it. It compares the distance to your target with the distance to your stop loss.
| Risk : Reward | Win rate needed to break even |
|---|---|
| 1 : 1 | 50% |
| 1 : 1.5 | 40% |
| 1 : 2 | 33.3% |
| 1 : 3 | 25% |
With a 1:2 ratio, you can be wrong on two trades out of three and still break even before fees. That's why a strategy doesn't need a huge win rate to work, as long as losses are kept small and wins are allowed to run. It's also why a very high win rate with tiny targets and distant stops should make you suspicious.
Limits Beyond a Single Trade
Risk per trade is the foundation, but a few extra limits protect you on volatile days:
- Total open risk: cap the combined risk of all open trades, for example at 5% to 6% of the account. Five trades at 1% each is very different from fifteen.
- Correlated trades count together: crypto coins often move as a group. Three longs on altcoins during a market-wide drop can behave like one big trade.
- Daily loss limit: stop trading for the day after losing a set amount, such as 3%. It prevents revenge trading.
- Recalculate as your balance changes: 1% of a smaller account is a smaller amount. Sizing down after losses slows a drawdown automatically.
Applying It to Crypto Signals
When you follow signals, the same rules apply. A few practical tips:
- Use the signal's stop loss to size the trade. Put the signal's entry and stop loss into the calculator and let your risk % decide the position, not the leverage in the signal.
- Entry zones: if the signal gives a range, use the average of the zone as your entry, or the worst price in the zone if you want to be conservative.
- Take partial profits: closing part of the position at the first targets and moving the stop to entry reduces the risk on the rest of the trade.
- Automating? If you use Cornix, set the trade amount so that a stop loss costs you around 1% to 2%. See our Cornix setup guide.
Every Bullstar signal includes an entry zone and a stop loss, so you can size each trade with this exact method. You can see how signals perform over time in our public track record.
Common Position Sizing Mistakes
- Sizing by margin instead of by risk. "I used $50 of margin" says nothing about how much you can lose.
- Using the same position size for every trade. Trades with different stop distances need different sizes.
- Raising leverage to make a trade "worth it". Leverage doesn't make