0DTE Diagonal Spread
Learn the 0DTE diagonal spread — combine vertical and calendar elements for flexible directional trades with time decay benefits.
Capital Required: $500-$2,000
The Diagonal Spread
Express directional views while exploiting multi-timeframe theta decay.
The Nuance of a 0DTE Diagonal Spread
The 0DTE Diagonal Spread is widely considered an advanced, complex options strategy because it forces you to manage multiple changing variables simultaneously. It is called a “diagonal” because it combines elements of a vertical spread (different strike prices) with a calendar spread (different expiration dates).
In the context of 0DTE trading, a diagonal spread typically involves selling an option that expires at the end of the current trading day, while simultaneously buying an option that expires in the future (e.g., tomorrow, next week, or next month) at a different strike price.
The Structural Setup
To initiate a standard 0DTE Diagonal Spread (often a “Poor Man’s Covered Call” variant), you execute the following:
- The Long Leg: Buy 1 In-The-Money (ITM) Option (Call or Put) expiring at a later date. This acts as your directional anchor.
- The Short Leg: Sell 1 Out-Of-The-Money (OTM) Option (Call or Put) expiring today (0DTE). This generates immediate income to offset the cost of the long leg.
Because you are buying an ITM option with significant time value, and selling an OTM option with very little time value, entering a diagonal spread will almost always cost you a net debit upfront.
How the Diagonal Makes Money
Profitability in a diagonal spread is driven by a delicate balance of Delta (directional movement) and Theta (time decay).
The primary engine of the trade is the 0DTE short leg. Because it expires today, its Theta decay is incredibly aggressive. If the market stays relatively flat or moves slowly in your favored direction, the short option decays to zero by the end of the day, allowing you to pocket the premium.
Meanwhile, your long, later-dated ITM option retains its value much better because its Theta decay curve is much flatter. By repeatedly selling 0DTE options against your long-dated position over several days, you can completely pay off the cost of the long option, eventually turning it into a “free” trade.
When to Deploy the Diagonal Spread
Mild Directional Bias:
The absolute best time to deploy a diagonal spread is when you have a slow, grinding directional bias. You want the stock to drift slowly toward your short strike without blowing past it today.
High Near-Term Volatility:
If 0DTE options are pricing in massive implied volatility (IV) due to an impending intraday event, but back-month IV is low, a diagonal allows you to sell the expensive front-month premium while buying cheap back-month exposure.
Capital Efficiency:
Buying 100 shares of SPY to sell covered calls costs roughly $50,000. Buying a deep ITM long-dated SPY call (Delta 0.80+) to use as the base for a diagonal spread might only cost $2,000, while providing nearly identical directional exposure.
Essential Risk Management for Diagonals
Trading diagonal spreads successfully requires strict adherence to risk parameters, as the dynamic Greeks can quickly spiral out of control:
Beware the Blow-Off Top:
The biggest risk to a diagonal spread is a massive, instantaneous move past your short strike. If SPY rockets upward past your short 0DTE call, your short call will start accumulating losses at a 1:1 ratio (Delta -1.0), while your long call might only gain at a 0.8 ratio (Delta 0.8). You can lose money if the stock goes too far in your favored direction.
Diagonal Widths:
Ensure the width between your long and short strikes is wide enough. If you buy a $400 Call and sell a $401 Call, you have almost no room for the stock to move.
Profit Taking:
The goal is to collect the theta decay of the short leg. If your short 0DTE option decays by 80% by 1:00 PM, close the entire spread or buy back the short leg. Do not hold it for the last $0.05 of premium and risk a late-day reversal.
Managing the Long Leg:
At the end of the day, after the 0DTE option expires worthless, you are left holding a naked long option. You must decide whether to hold it overnight, sell it for a profit, or use it tomorrow to sell another 0DTE option against it.
Master Multi-Timeframe Trading
Stop getting chopped up in fast markets. Join 01DTE.com to access advanced volatility surface analytics, real-time alerts, and a community of elite options traders who specialize in complex spreads.
Start Trading with 01DTE
To further refine your strategy, consider comparing this approach with the 0DTE Iron Butterfly Strategy: The Ultimate Guide or exploring the mechanics behind 0DTE Cash-Secured Put. Everything ties back into the foundational concepts available in our 0DTE Strategies Hub.
If you want to visualize these market forces live, check out the 01DTE dashboard.
Disclaimer: This content is for educational purposes only. Not financial advice. Options trading involves substantial risk. Consult a licensed financial advisor before trading. Full disclaimer
Related Articles
0DTE Calendar Spread
Master the 0DTE calendar spread — profit from time decay differences between near and far expirations on the same strike.
0DTE Ratio Spread
Understand the 0DTE ratio spread — trade more options on one side for enhanced premium with defined but potentially unlimited risk.
0DTE Vertical Spread Strategy
Complete guide to 0DTE vertical spreads — the building block of most 0DTE strategies. Bull and bear verticals for directional trading.
0DTE Strangle Strategy
Learn the 0DTE strangle — a cheaper alternative to straddles. Buy OTM options to profit from large moves while reducing premium costs.
0DTE Straddle Strategy
Master the 0DTE straddle for volatility plays and breakout trading. Learn the difference between [strangle](/strategies/0dte-strangle/) and straddle strategy, and when to deploy them.
About the Author
Raheel Nawaz
Subject Matter ExpertOptions trader and educator specializing in 0DTE strategies with over a decade of experience in short-dated options and futures markets.