0DTE Options Calculator
Analyze same-day expiration strategies. Calculate P/L, visualize theta decay, assess gamma risk, and build MEIC entries.
Profits if stock stays between breakevens by market close
Profit / Loss at Expiration
Strategy Summary
This Iron Condor profits up to $200 if the stock stays between $493.00 and $507.00 by market close. Max loss is $300 if either spread is fully breached.
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Try Alpha Copilot freeWhat Are 0DTE Options?
0DTE options — zero days to expiration — are options contracts that expire at the close of the current trading session. Index products like SPX, SPY, QQQ, and NDX offer daily expirations, meaning traders can participate in 0DTE strategies every market day. Because there is almost no time value remaining, premium is low, theta decay is extreme, and gamma sensitivity is at its peak.
Sellers of 0DTE options capture the final burst of theta decay in a single session. Buyers use 0DTE for leveraged directional bets on same-day moves. The key risk on both sides is gamma: a sudden move in the underlying can dramatically shift an option's delta and P/L in minutes.
0DTE Strategies Explained
Iron Condor
The iron condor is the most popular 0DTE strategy. You sell an OTM call spread and an OTM put spread simultaneously, collecting a net credit. You profit if the underlying stays between your short strikes at expiration. Maximum profit is the net credit; maximum loss is the spread width minus the credit.
Credit Spreads
A single-direction defined-risk strategy. A put credit spread profits when the underlying stays above your short put strike; a call credit spread profits when it stays below your short call strike. Simpler than iron condors and useful when you have a directional bias.
MEIC (Multiple Entry Iron Condor)
Instead of a single iron condor entry, MEIC ladders 2–3 entries throughout the day. This reduces timing risk — a bad open move won't ruin your entire position — and can improve average credit received across all entries.
Naked Short Straddle / Strangle
Selling a same-strike call and put (straddle) or different-strike call and put (strangle) with no defined risk. Extremely high premium collection, but losses are theoretically unlimited. Only appropriate for traders with large accounts and active risk management.
0DTE Risks Every Trader Should Know
Gamma explosion: Near-expiration options can swing from worthless to fully in-the-money on a single large candle. A gap or news-driven move of even 0.5% can turn a winning iron condor into a max-loss trade in under a minute.
Liquidity and slippage: 0DTE spreads can be wide during volatile periods. Always use limit orders and account for slippage in your breakeven calculations. Paying too much for protection eats into your edge.
Assignment risk: Short options that finish in-the-money at expiration are assigned. For SPX (cash-settled) this is straightforward; for SPY (share-settled) it creates overnight share positions. Understand your product's settlement rules before trading.
Overtrading: The daily cadence of 0DTE can tempt traders to overtrade. Transaction costs, slippage, and emotional decision-making compound quickly. Set clear rules for entry, stop-loss, and profit targets before the session begins.
Popular Strategy Setups
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Frequently Asked Questions
What are 0DTE options?
0DTE (zero days to expiration) options expire at the end of the current trading day. They offer the highest theta decay, amplified gamma sensitivity, and low premium costs. SPX and SPY offer daily expirations, making 0DTE strategies accessible every trading day.
What is the best 0DTE strategy?
The most popular 0DTE strategies are iron condors and credit spreads. Iron condors profit when the underlying stays in a range — you sell both an OTM call spread and an OTM put spread and collect a net credit. Credit spreads are simpler with defined risk. MEIC (Multiple Entry Iron Condor) ladders entries throughout the day to reduce timing risk.
How does theta decay work for 0DTE options?
Theta accelerates dramatically as expiration approaches. For 0DTE options, nearly all remaining time value erodes within the trading day. At-the-money options experience the fastest decay rate in dollar terms, while the percentage decay is more uniform across strikes. Sellers benefit from this rapid decay; buyers fight against it every hour.
What is gamma risk in 0DTE options?
Gamma measures how quickly delta changes as the underlying moves. 0DTE options have extreme gamma, especially near-the-money. A small move in the underlying can cause large delta swings, which means P/L can shift dramatically with each tick. This makes 0DTE positions very sensitive to sudden price moves and requires active risk management.
What is the MEIC strategy?
MEIC (Multiple Entry Iron Condor) is a 0DTE approach where you open iron condor positions at multiple times throughout the day — for example, at market open, midday, and early afternoon. This averages your entry premium and reduces the impact of poor timing on any single entry, while still capturing the rapid theta decay of same-day expirations.
What is the best time of day for 0DTE trades?
Most 0DTE traders avoid the first 30-60 minutes when volatility is highest and spreads are wider. Common entry windows are 10:00–10:30 AM ET (after the open settles), 11:00 AM–12:00 PM ET (midday calm), and 1:00–2:00 PM ET. Many traders exit before 3:45 PM ET to avoid the volatile closing auction period.
How much capital do you need for 0DTE options?
SPX iron condors typically require $5,000–$20,000 in buying power per condor depending on strike width. SPY credit spreads can be traded with $500–$2,000 per spread. Most brokers require a margin account and options approval level 3 or 4 for defined-risk spreads. Start small — 0DTE gamma can turn profitable positions into losses quickly.
Are 0DTE options risky?
Yes — 0DTE options carry significant risk due to high gamma and rapid value swings. A gap move or sudden news event can blow through your spreads in minutes. However, the risk is defined when trading spreads or iron condors: your maximum loss is capped at the spread width minus the credit received. Proper position sizing, stop-loss management, and never risking more than you can afford to lose are essential.