Intro
Aptos perpetual contracts let you trade crypto with leverage and no expiration date, but position size determines whether you survive market swings. This guide shows the exact steps to calculate a safe size for your trades on the Aptos blockchain.
Key Takeaways
- Position size = (Account equity × risk %) ÷ ((Entry price – Stop‑loss price) ÷ Leverage)
- Risk 1–2 % of equity per trade to protect capital.
- Include funding rates, slippage, and platform fees in the calculation.
- Use current equity, not borrowed funds, as the risk base.
What Is Position Sizing?
Position sizing is the process of deciding how many contracts to open based on your total account equity and the risk you are willing to accept per trade. In Aptos perpetual contracts, it translates a given risk tolerance into a concrete number of tokens you can safely trade.
Why Position Sizing Matters
Improper sizing is the leading cause of liquidation in leveraged trading. The Bank for International Settlements reports that excessive leverage amplifies loss spirals in crypto markets (BIS, 2023). By allocating a fixed percentage of equity to each position, you reduce the chance that a single adverse move wipes out your account.
How It Works
Step‑by‑step formula
- Choose a risk percentage (e.g., 1 %).
- Calculate risk capital: Risk capital = Equity × Risk %.
- Set entry and stop‑loss prices.
- Find the price distance: Distance = Entry price – Stop‑loss price.
- Adjust for leverage: Adjusted distance = Distance ÷ Leverage.
- Derive contract count: Contracts = Risk capital ÷ Adjusted distance.
Formula breakdown
The compact form is:
Position size = (Equity × Risk %) ÷ ((Entry – Stop) ÷ Leverage)
Example: equity $10 000, risk 1 % ($100), entry $2 000, stop $1 900, leverage 5×.
Distance = $100 → Adjusted distance = $100 ÷ 5 = $20.
Contracts = $100 ÷ $20 = 5 contracts (each $1 000 notional).
Used in Practice
Alex Chen 作者
加密货币分析师 | DeFi研究者 | 每日市场洞察
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