0DTE Risk Commandments

This module is the risk doctrine for 0DTE trading — trading options that expire today. "0DTE" stands for "zero days to expiration": an option contract with only hours of life left. You already know from Level 1 and Level 2 what an option is — a contract giving the right to buy (a call) or sell (a put) 100 shares of something at a set price (the strike price) before it expires. A 0DTE option is that same contract on its final day, and the final day changes everything about the risk.

Here is the honest warning up front. On expiration day, theta — the daily cost of time passing, which eats an option's value — does not just speed up. It accelerates violently in the final hours, because there is almost no time left to lose. Gamma — how fast an option's price sensitivity changes — does the same thing, so a 0DTE contract can swing from "working" to "worthless" in minutes. A bought 0DTE option can lose 100% of what you paid for it, fast, on an ordinary wiggle. Most 0DTE premium buyers lose money. That is the base rate. The traders who survive this arena are not the best predictors — they are the ones with the strictest rules.

This module gives you seven commandments. They are not tips. You do not get to follow six of them. In 0DTE, the day you break a rule is usually the day that costs you the month.

Why 0DTE Needs Its Own Rulebook

In normal trading, a mistake is often recoverable. You buy a stock at $50, it dips to $48, you have time to think. A 0DTE contract gives you no such mercy, for three reasons.

• The asset is melting. An option's value has two parts: intrinsic value (what it would be worth exercised right now) and time value (what buyers pay for the chance it moves). On expiration day the time value is draining to zero by the clock, not by opinion. A contract you bought for $1.50 in the morning can be worth $0.30 by lunch even if the market barely moved.
• Decisions come faster than judgment. A normal trader might take one or two trades in a day. A 0DTE trader can take ten — each one a fresh chance to be wrong, emotional, and oversized. Your rules must be set while you are calm — they will be executed when you are not.
• There is no tomorrow for the position. A stock that dips can come back next week. An expiring contract that is worthless at the close is worthless forever. Every 0DTE position ends today: sold, exercised, or zero.

The Commandments

Commandment 1: Set the Daily Max Loss in Dollars Before the Open — and Keep It Smaller Than

a Normal Day

The rule: Before the market opens, write down the most money you are allowed to lose today, in actual dollars. When your losses reach that number, you are done. Not "probably done." Done.

Why: Your Level 1 rule was to risk about 1% of your account per trade — on a $10,000 account, $100 per trade. In 0DTE that number is too big per trade, because trades come so much faster. Risk $100 five times before lunch and you are down $500 — 5% of your account — before your coffee is finished. So 0DTE sizing starts smaller: a fraction of the 1% rule per trade, most often 0.25% to 0.5%.

Worked example on a $10,000 account:

• Per-trade risk at 0.5% = $50 per trade.
• Daily max loss at 3 trades' worth = $150 for the day.
• Three losing trades in a row = you are down $150, which is a bad morning, not a disaster.

Compare that with a normal stock-trading day, where one or two trades at 1% risk means a worst day of about $100–$200 anyway. Your 0DTE day is deliberately capped at a similar or smaller size. The exact percentages are yours to set — what is not negotiable is that the numbers are written before the open, while you are calm, and never renegotiated during the session.

Commandment 2: Cap the Number of Trades

The rule: Decide the maximum number of trades you may take today — three is a sane ceiling for a developing trader — and count every entry, including "just one more."

Why: Every trade is a coin you flip against your own discipline. Early trades are usually your planned ones. Late trades are usually frustration wearing a costume. A trade cap also protects you from a slow bleed: ten small "harmless" 0DTE losses at $50 each is $500 — the same damage as one huge mistake, except it felt reasonable the whole way down. If your three trades are done and the market does something beautiful at 2 PM, watch it, journal it, and leave it. The market opens again tomorrow — your account has to be alive to see it.

Commandment 3: Never Average Down an Expiring Contract

Averaging down means buying more of a losing position to lower your average cost. With stock, it is debatable. With an expiring option, it is how accounts die.

Why: A stock that fell from $50 to $45 is cheaper. An expiring contract that fell from $1.50 to $0.60 is usually not cheaper — it is closer to worthless, because most of that drop is time value burning off on schedule. It is a melting asset, not an investment. You are not buying a discount. You are buying more of the melt.

Worked example: you buy 5 contracts at $1.50 = $750. The contract falls to $0.60. Averaging down, you buy 5 more at $0.60 = $300 more, "because now my average is only $1.05." Your total spent is now $1,050 on a contract with hours of life left. If it expires worthless — the common outcome for a contract that has already collapsed — you turned a $750 problem into a $1,050 loss. Averaging down did not reduce your risk. It increased your exposure to the exact outcome already happening.

Commandment 4: Set Hard Exit Times

The rule: Every 0DTE position gets two exits decided before entry: a price exit (your stop — the loss amount that closes the trade) and a time exit (a clock time by which the position is closed, no matter what it is doing). A position still open at your cutoff gets closed, not hoped.

Why: In the final stretch of the session, theta decay is at its most violent and prices whip around on small moves. "I'll give it ten more minutes" is the most expensive sentence in 0DTE, because in those ten minutes a contract can halve — and then halve again. A time exit also protects you from the end-of-day trap with share-settled options: holding a SPY option into the close can leave you assigned shares and overnight risk you never planned.

Worked example: your rule is "flat by 3:30 PM ET." At 3:30, your contract bought for $1.20 is at $0.95. You close it: loss = 2 contracts × ($1.20 − $0.95) × 100 = $50. Annoying. The trader without a cutoff "gives it a chance," watches it print $0.20 by 3:50 on one wrong wiggle, and exits at 2 × ($1.20 − $0.20) × 100 = $200 — or holds to expiration and loses the full $240.

Commandment 5: When the Daily Stop Is Hit, the Platform Closes — and There Is No Revenge

Trade

A revenge trade is a trade taken to win back a loss. It is not analysis. It is anger with a buy button.

Why: The moment you hit your daily max loss, you are in your worst decision-making state of the day: frustrated, rushed, and focused on a number instead of the market. So the rule is physical, not mental: when the daily stop is hit, you close the platform. Closed means closed — you do not "just watch for a setup," because watching leads to clicking. Log the day in your journal while it is fresh, and leave. The traders who last in 0DTE are not the ones who never have red days. They are the ones whose red days are small and boring.

Commandment 6: Size Spreads by Max Loss — Never by "Contracts I Can Afford"

A spread is a combination of two options — one bought, one sold — that caps both your profit and your loss. Spreads are the sanest route into 0DTE for most people — but only if you size them honestly.

The math that matters:

• Debit spread (you pay to open it): max loss = the debit paid. Pay $1.30 for a spread → max loss is $130 per spread.
• Credit spread (you get paid to open it): max loss = width of the strikes minus the credit received, times 100. Sell a $5-wide spread for $1.20 credit → max loss = ($5.00 − $1.20) × 100 = $380 per spread.

Why: The trap is sizing by purchase price. "The spread only cost $1.30, and I have $1,300 — I can afford ten of them." Ten debit spreads at $130 max loss each = $1,300 of real risk — 13% of a $10,000 account on one idea. The premium felt small. The risk was not. Or the credit version: "I collected $120, great deal" — while quietly accepting $380 of risk per spread to collect it.

Correct sizing works backwards from your risk number. Your per-trade risk is $50 (Commandment 1). A credit spread with $380 max loss does not fit your plan at any size — even one spread risks more than seven trades' worth of your per-trade limit. You either find a narrower structure whose max loss fits, or you skip the trade. Skipping is a position too.

Commandment 7: One Good Trade — A+ or Nothing

The rule: You are looking for one good trade — your best, fully planned setup, the one you would take with your instructor watching over your shoulder. That is the whole day's ambition. If it never appears, you take zero trades, and zero is a winning score.

Why: 0DTE manufactures temptation. Something is always moving, always expiring, always whispering "you could double your money in twenty minutes" — and sometimes that's true, which is exactly what makes it dangerous. The mindset shift is from "how many trades can I take?" to "how few trades can I take and still call this a good day?" One planned trade, sized and exited by the rules, teaches more and costs less than eight improvised ones. Chasing every move is not ambition — it is how the arena collects its fee, and the fee is your account.

The Commandments at a Glance

Worked Example: A Bad-Day Autopsy

Same trader. Same $10,000 account. Same losing morning in the market. Two versions of the day — one where the commandments exist, and one where they do not. Watch how the damage is never caused by the market — it is caused by which rule breaks first, and what that break unlocks.

Version One: The Day With No Rules — Final Score: −$1,850

Trade 1 — Violation: oversizing (Commandments 1 and 6 broken). The trader never set a per-trade risk number, so "feels right" did the sizing: 10 contracts bought at $1.20 = $1,200 — twelve percent of the whole account riding on one expiring idea. The market moves against the trade. The contract falls to $0.75 and, with no planned stop either, the trader finally exits there: 10 × ($1.20 − $0.75) × 100 = −$450. One trade just cost more than an entire ruled day is allowed to lose.

Trade 2 — Violations: revenge entry and averaging down (Commandments 3 and 5 broken). Now the trader is not analyzing — he is trying to get his $450 back. He re-enters: 10 contracts at $0.90 = $900. The contract keeps melting, down to $0.50. Instead of exiting, he averages down: 10 more contracts at $0.50 = $500 more, telling himself his average cost of $0.70 "only needs a small bounce." There is no bounce. There is only the clock. All 20 contracts expire worthless: −$900 − $500 = −$1,400 on this one idea. No daily stop and no cutoff existed, so he held to expiration, hoping.

The day's total: −$450 + −$1,400 = −$1,850. That is 18.5% of the account in a single day. And the quiet damage underneath: to recover from −18.5%, the account needs a gain of about +23% just to get back to $10,000 — months of good trading spent climbing out of one morning's hole.

Version Two: The Same Day With the Commandments — Final Score: −$300, Done by 11 AM

The rules, written before the open: per-trade risk $100 (a starter Level 3 size while learning this arena), maximum 3 trades, daily max loss $300, flat by a set time, platform closes at the stop.

Trade 1: Sized by the stop, not by excitement. The trader buys 2 contracts at $1.20, with a planned exit at $0.70. The market moves against it — same market as Version One — and the stop fills: 2 × ($1.20 − $0.70) × 100 = −$100. Trade 2: a second planned idea, same size, also wrong: −$100. Trade 3: third and final allowed trade, same size, also wrong: −$100. Daily max loss reached: −$300. Platform closed. Journal written. Done by 11 AM.

The Autopsy Report

Nothing about the market differed between the two versions. Every idea lost in both. The entire $1,550 difference was manufactured by three decisions: sizing by feel instead of by max loss, re-entering for revenge, and averaging down into a melting contract. In 0DTE, your losses are mostly self-inflicted — good news, because what is self-inflicted can be rule-inflicted instead.

Common Mistakes at This Level

• Setting the daily max loss in your head. If it is not written down before the open, it does not exist — it will be renegotiated at the worst moment.
• Using the full Level 1 1% per-trade risk in 0DTE. Five fast trades at 1% is a 5% day. Fraction it down.
• Counting a re-entry as "the same trade." Every entry counts against the cap — splitting one bad idea into four entries does not make it one trade.
• Averaging down because "it's cheap now." An expiring contract at $0.30 is usually cheap for a reason: it is nearly out of time and nearly out of hope.
• Treating a credit spread's premium as the risk. You collected $120; your risk is $380. Size from the $380.
• Moving the exit time "just this once." The cutoff exists precisely for the day it feels most wrong to honor it.
• Giving back a green morning with three afternoon "bonus" trades. The trade cap applies on good days too.

Chapter Summary

• 0DTE options expire the same day; theta decay and gamma accelerate violently in the final hours, and a bought contract can lose 100% in minutes.
• Set a daily max loss in actual dollars before the open — and size each trade at a fraction of the Level 1 1% rule, because trades arrive faster here.
• Cap your trades; every entry counts, including re-entries of the same idea.
• Never average down an expiring contract — it is a melting asset, and adding increases exposure to the outcome already happening.
• Every position gets a price exit and a time exit before entry; a position open at the cutoff gets closed, not hoped.
• When the daily stop is hit, the platform closes. Revenge trades are donations.
• Size spreads by max loss: debit spread max loss = debit paid; credit spread max loss = width − credit (× 100). If one spread's max loss exceeds your per-trade risk, it does not fit.
• The goal is one good trade. Zero trades on a day with no A+ setup is a winning score.
• The bad-day autopsy: identical losing ideas cost −$1,850 without rules, −$300 with them. The difference was never the market.

Check Yourself

1. On a $10,000 account, why should per-trade risk in 0DTE be a fraction of the Level 1 1% rule instead of the full $100?
2. You sell a $5-wide credit spread and collect $1.20. What is your maximum loss on one spread?
3. Your contract has fallen from $1.50 to $0.60. A fellow student says "average down, it's cheap." What is wrong with that advice in 0DTE?
4. Your rules say flat by 3:30 PM. At 3:30 your position is open and down. What do you do, and why?
5. In the bad-day autopsy, both versions of the trader had only losing ideas, yet one lost $1,850 and the other $300. Name the three decisions that created the difference.

Show answers

Answers: 1) Because trades come much faster in 0DTE — several full-size losses can stack into a 5% day before lunch; smaller per-trade risk (such as 0.25–0.5%) keeps the whole day survivable. 2) ($5.00 − $1.20) × 100 = $380. 3) The drop is mostly time value melting on schedule, not a discount — the contract is closer to worthless, and adding increases exposure to the outcome already unfolding. 4) Close it. The cutoff was set while calm; in the final stretch decay is at its fastest, and "ten more minutes" is how small planned losses become full losses. 5) Sizing by feel instead of max loss (10 contracts, $1,200), the revenge re-entry after the first loss, and averaging down into the expiring contract — plus the missing daily stop and cutoff that let all three run to expiration.