Most blown accounts aren't bad trades — they're the right trade, sized wrong. Enter your account details below to find the exact position size that keeps every single trade within your risk limit.
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Based on your stop-loss distance, here is what each reward-to-risk ratio pays out in dollars:
Bybit supports up to 100x leverage on crypto futures with industry-leading liquidity. Use the calculator above to set your position size before every trade, then execute on a platform built for risk management.
Every trader eventually learns the same painful lesson: the entry is almost irrelevant. A well-known veteran trader once said "I've seen new traders who were right 30% of the time and still made money, and I've seen traders who were right 70% of the time and still blew up." The difference is always position sizing.
When you enter a trade, the market doesn't care about your thesis. What matters is how much of your capital you've exposed to being wrong. If you are risking 10% of your account on every trade, three consecutive losses — a completely normal event in any strategy — takes you down 27%. Five losses in a row puts you at 59 cents on the dollar. At that point, you need a 71% gain just to break even. The math works violently against oversized positions.
Professional traders and fund managers almost universally cap risk at 1–2% of account equity per trade. The 1% rule is simple: no matter how confident you are, never put more on the line than 1% of your account value on a single trade's stop-loss. This is not about being conservative on every trade — you can still size up a $10,000 account to a $5,000 notional position. It just means if that position hits your stop, the actual dollar loss is capped at $100 (1% of $10k).
This rule keeps you in the game through losing streaks. With 1% risk per trade you need to lose 50 consecutive trades before your account is down 40% — a virtually impossible streak for any strategy with positive expected value. With 10% risk per trade, the same destruction happens in just seven losses.
This is one of the most misunderstood concepts in crypto trading. Leverage does not change your dollar risk — your stop-loss does. If you are risking $50 on a trade with a $5 stop distance, you hold 10 units regardless of leverage. What leverage changes is how much margin (collateral) the exchange requires you to post. At 1x leverage, a $1,000 position requires $1,000 margin. At 10x leverage, that same $1,000 position requires only $100 margin.
The danger with leverage is that traders see the freed-up capital and instinctively take bigger positions. They use 10x leverage and then fill their $1,000 margin with a $10,000 position — turning a 1% risk trade into a 10% risk trade. The calculator above always shows you both numbers: position size (what you're controlling) and margin required (what you're posting), so you are never confused about what is actually at stake.
After studying hundreds of wipeout stories on crypto trading forums, the pattern is consistent. First: entering without a defined stop-loss, holding losses emotionally until a small loss becomes a catastrophic one. Second: sizing based on how "sure" the trade feels rather than a fixed percentage rule — overconfidence is the most reliable path to blowing an account. Third: ignoring that leverage multiplies not just gains but the speed at which a position can reach liquidation. A $100 BTC move that is irrelevant at 1x becomes an account-ending event at 50x if the position is oversized.
The solution to all three is mechanical risk management. Set your risk percentage. Calculate the position size with this tool. Place your stop before you enter. Treat the stop-loss as a rule, not a suggestion. The entry, the exit target, the thesis — all of that matters far less than the simple discipline of never risking more than your predetermined amount.
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