Position Sizing
By Menno — 13 years in crypto, 3 bear markets survived, zero paid promotions
Last updated: March 2026
Position sizing is the process of determining how much capital to allocate to a single trade or investment, balancing potential reward against the risk of loss.
Position sizing is one of the most critical — and most overlooked — skills in crypto investing. It determines what percentage of your total portfolio you put into any single asset or trade. Even a correct market call can destroy a portfolio if the position size is too large.
The most common frameworks are fixed percentage (e.g., never risk more than 1-2% of total capital on a single trade), Kelly Criterion (mathematically optimal sizing based on win rate and average win/loss), and volatility-adjusted sizing (smaller positions in higher-volatility assets). For crypto, where a coin can drop 80% in weeks, conservative position sizing is non-negotiable.
A practical example: if you have €10,000 and are willing to lose 2% (€200) on a trade, and your stop-loss is 20% below entry, your maximum position size is €1,000. This is the core of professional risk management — you control loss magnitude before you enter, not after.
Concentration risk compounds the problem in crypto. Many retail investors put 50-80% of their portfolio into one or two coins, then watch a single thesis failure wipe out years of gains. Professional traders rarely put more than 5-10% in any single position, and many cap altcoin positions at 2-3%. The Alpha Factory Altcoin Rules framework explicitly accounts for position sizing as part of the allocation score.
Frequently Asked Questions
What is a good position size for a single crypto trade?
For active trading, risking more than 1-2% of total capital per trade is generally considered aggressive. For longer-term holds, most professional investors cap individual positions at 5-10% of portfolio, with higher-risk altcoins at 2-3% maximum.
How does volatility affect position sizing in crypto?
Higher volatility requires smaller positions to maintain the same dollar-risk per trade. A Bitcoin position with a 15% stop-loss needs to be roughly 3x smaller than a stock position with a 5% stop-loss to risk the same absolute amount.
Related Tools on Alpha Factory
Related Terms
Risk/Reward Ratio
The risk/reward ratio compares the potential loss on a trade (from entry to stop-loss) against the potential gain (from entry to take-profit), expressed as a ratio like 1:2 or 1:3.
Stop Loss
A stop loss is an order that automatically sells your position when the price drops to a specified level, limiting your potential losses. It's a risk management tool that removes emotion from selling decisions.
Portfolio Concentration
Portfolio concentration refers to how much of your investment capital is allocated to a small number of assets, with higher concentration meaning greater exposure to individual asset performance.
Portfolio Allocation
Portfolio allocation is how you divide your total investment capital across different assets, sectors, or risk levels to balance growth potential against drawdown risk.
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