Buy — units
Keep just enough at the exchange for up to 10× leverage, with liquidation beyond your stop: every dollar there is exposed to hacks.
Liquidation — away
Stop — away
Position = portfolio × risk per trade ÷ stop distance · Leverage = position ÷ collateral · Liquidation distance ≈ 1 ÷ leverage · R/R = exit distance ÷ stop distance · Break-even win rate = 1 ÷ (1 + R/R). Liquidation is simplified (no fees or maintenance margin), so a real exchange closes you a little earlier.
Limits: stop 0.25–25% from entry, exit 0.25–50%, risk 0.1–5%, collateral up to the portfolio and leverage up to 150×.