SPX500 (S&P 500) Lot Size Calculator for AquaFunded

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SPX500 position sizing is refreshingly simple compared to other indices - each point move equals $1 per lot, eliminating complex contract specifications. The 45-point average daily range gives you solid breathing room for stop placement without getting chopped out by normal market noise. For stop losses, I typically use 15-25 points on SPX500, capturing about one-third to half the daily range. Going tighter than 10 points invites premature exits, while stops beyond 30 points eat too much risk capital relative to realistic profit targets. Worked example: $10,000 account, 1% risk ($100), 20-point stop. Calculation: $100 ÷ 20 points = 5 lots maximum. At 2% risk ($200), same stop allows 10 lots. The math scales linearly since pip value is fixed at $1. SPX500 suits AquaFunded's structure perfectly. The 5% daily loss limit translates to roughly 500 points of adverse movement on a full-size position, while the 45-point daily range means you're unlikely to hit limits from single trades. The instrument's liquidity during US sessions aligns with when most prop traders are active. Key advantage: no overnight financing costs like forex, and less gap risk than individual stocks. The index's diversification reduces single-name blow-up risk that can devastate accounts trading individual equities. Watch out for Fed days and major economic releases when the daily range can spike to 80+ points. Scale down position sizes during high-impact news to avoid the firm's drawdown limits. The 10% max drawdown rule means you can't afford many full-size losing trades, so err toward smaller positions when volatility expands beyond the typical 45-point range.

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