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Education is the Markets family’s free school — a progressive SPY options course in plain English, from “should you trade at all?” to reading the live board it teaches, the SPY Sheet.

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TUITION SIZING: THE DIAL AT ITS FLOOR

Lesson 66 of 72 · 8 min read · Stage 10 · Optional: First Tiny Live Trades · Updated Oct 21, 2026
STAGE 10 — Optional: First Tiny Live Trades · Prerequisite: THE LIVE ACCOUNT, FUNDED
TL;DR
  • Live sizing runs Stage 4’s two dials at their most conservative joint setting: maximum loss per trade ≤ 1% of the CERTIFIED figure — the floor of the 1–3% house band for spreads — one contract, one position at a time. On the example’s $25,000, the cap is $250.
  • The cap shrinks the menu before any view is consulted: the 773/775 debit vertical ($142 max loss) is the first-ten instrument; the 780/785 ($296) and the 765/760 credit ($396) are not eligible at one contract — they wait for a later phase and a fresh decision, however good the setup looks.
  • The block is budgeted like tuition, because it is: on Stage 9’s sample expectancy (−0.24R per trade), ten trades at the example structure’s R of $142 carry an expected cost of about $341. The pre-committed floor — the loss at which the block stops early — is −3R: −$426. Expect to pay; the floor is the most you will be allowed to.

Paper let the max-loss dial run to 1.58% of the account. Live cuts it to its 1% floor, keeps one contract, and lets the division shrink the menu to a single structure class — with the arithmetic for what ten trades should be expected to cost. A flight school’s first solo works the same way. The student has flown every manoeuvre with an instructor; the solo still restricts the aeroplane, the weather and the airfield — not because the student is distrusted, but because the first hours alone convert supervised skill into unsupervised habit, and the restrictions keep every surprise small while that conversion happens. Nobody solos in a crosswind to prove something. Live sizing is the solo restriction card: the smallest structure, the calmest conditions (your PlayBook’s best-documented setup only), and a fuel limit — the block floor — that brings you home while the lesson is still cheap.

Sizing panel · EXAMPLE — the course’s example figures · Stage 4 taught two dials that must never be conflated: risk per trade (0.5–1% of the account) and a spread’s maximum loss as a share of the account (published house rules run 1–3%). Paper’s sample let the second dial reach 1.58% (the $396 credit vertical). The live setting pins it to its 1% floor against the certified figure — a $250 cap on the example’s $25,000 — and the menu obeys: the 773/775 debit at $142 passes; the 780/785 at $296 and the 765/760 credit at $396 do not, at one contract, whatever the view. Under a certified figure of about $14,200 the division’s answer for even the smallest structure is zero — and zero is an answer (Stage 4).

THE TAKEAWAYS

  • The two dials, reprinted because this lesson runs on them (Stage 4, Lesson 2): RISK PER TRADE — what one trade may cost you against plan, the course’s 0.5–1% default — and MAXIMUM LOSS AS A SHARE OF THE ACCOUNT, the dial published house rules for defined-risk spreads express as 1–3%. Stage 9’s sample ran the second dial at 1.18% (the $296 debit) and 1.58% (the $396 credit) on paper, where learning the dial was free. Live, that dial is pinned to its floor — 1% — and the first dial is honoured by the one-contract, one-position form the block takes. Conflating the dials was a beginner error on paper (Stage 4 said so); with money attached it is an expensive one.
  • The division, run in the open (Stage 4’s order: budget first, division second, order last). Certified figure $25,000 × 1% = a $250 maximum-loss cap per live trade. The candidates at one contract: the 773/775 debit — max loss $142 = 0.57% of the figure ✓; the 780/785 debit — $296 = 1.18% ✗; the 765/760 credit — $396 = 1.58% ✗. Notice what the division is really saying: at one contract there is no smaller size to retreat to, so size is chosen by STRUCTURE — and two of the course’s three structures are simply not first-ten instruments. Stage 7 printed the same wall from the other side: the $396 credit ‘first fits at 1% on about a $39,600 account’ (396 ÷ 0.01). The $296 debit first fits at $29,600; the $142 debit at $14,200.
  • The zero line, stated plainly: a certified figure under about $14,200 buys zero contracts of even the smallest structure this course teaches, at the live setting. The division’s answer is zero, and Stage 4’s rule governs — zero is an answer. That learner’s Stage 10 outcome (keep building the paper record and the certified figure, and let the stage wait) is a complete, respected result of this stage, not a failed one. What the course will never do is solve the arithmetic by widening risk: no narrower gamble, no undefined-risk substitute, no ‘just this once’ at 2%.
  • Friction joins the sums (Lesson 2’s preview, priced): at the published example schedule, one round trip on a two-leg spread carries $2.60 of contract fees — 1.8% of the $142 maximum loss, paid before the market moves — and the toll actually paid against the mid is read off each fill report and journaled per trade. Across the ten trades of the block, contract fees alone budget to $26.00. Paper’s friction was a convention; live friction is a line item, and at this size it is not a small one — which is part of the block’s honest price, stated before trade #1 rather than discovered after trade #10.
RUSTY’S RULE
One contract, one position, max loss ≤ 1% of the certified figure — and when the division says zero, zero is the size.

WORKED EXAMPLE — STEP BY STEP

  1. Set R for the block. With one eligible structure class, R is its printed maximum loss: $142, for the 773/775-class debit at Stage 7’s fill. Every trigger in Lesson 4 is denominated in this R, so the block’s whole risk conversation fits in three numbers — the cap, the expectation, and the floor — all computed now, in the calm, and never again at a ticket.
  2. The expected cost: Stage 9’s sample — twelve paper trades on these very structures, errors included — ran an expectancy of −0.24R per trade. Ten live trades at that rate: −2.4R × $142 = −$340.80, call it ≈ $341. That is the honest central expectation for the block: not a warning, a budget line. A learner who cannot hear ‘this will probably cost about $340’ as the price of ten graded live repetitions is not ready to buy them — and finding that out here, in arithmetic, is the lesson working exactly as designed.
  3. The floor: pre-committed at −3R = −$426 (Lesson 4 turns it into a trigger with paperwork). −$426 is 8.5% of the $5,000 tranche and 1.7% of the certified figure — sized so that the worst permitted outcome of the entire live experiment is an amount the Stage 0 certification already absorbed on paper. Note the ordering: the block may end early by its floor, but it may not end late by negotiation. The floor is a door written before entry, in Stage 8’s sense — for the whole block.
  4. The good tail, for symmetry: the same sample’s GOOD trades ran +0.43R across seven, so a disciplined block landing modestly positive is entirely plausible. Print both tails whenever the block is discussed: expected ≈ −$341; floor −$426; a clean block plausibly near flat to positive. Anyone — including the voice in your own head at trade #6 — who quotes only one tail is selling something.
  5. The sizing card, filled for the example (it transfers onto Lesson 4’s protocol card): certified figure $25,000 · cap $250 per trade · eligible: 773/775-class debit only · size 1 contract · open positions 1 · R = $142 · block floor −$426 · expected block cost ≈ −$341 · contract fees ≈ $26 for the block at the example schedule. On your card, every number is recomputed from YOUR worksheet figure and YOUR structures’ printed maxima. The example’s numbers are the format — never the prescription.
SIZING BY ENTHUSIASM

The losing variant arrives dressed as ambition: the block’s first setup happens to be the wide debit, ‘the best chart of the month’ — $296 of max loss, ‘only 1.18%, and the PlayBook rate is strong.’ Every clause is a negotiation the sizing card exists to end. 1.18% is not the live setting. The PlayBook’s rate is a paper statistic over a handful of trades, and Stage 4’s error bars eat it whole. And ‘the best chart’ is a judgement the protocol deliberately rations to one structure class, so it cannot be spent re-writing risk. The block that starts by bending its cap has no cap — it has a suggestion — and Lesson 4’s triggers inherit the weakness: a floor negotiated once will be negotiated again at −$426. The trade itself might even win. The block has still failed its first examination, and Stage 9’s grading says so in one word: BAD.

WHY THE CUT IS THE LESSON, NOT A VERDICT ON YOU

Three separate reasons converge on the same small numbers, and it is worth seeing all three. (1) THE SAMPLE-SIZE REASON (Stage 4): ten trades cannot distinguish skill from luck at any size — the block buys information about YOUR process under real fills, and information does not get better when it gets more expensive. (2) THE FEELINGS REASON (Lesson 5’s preview): real losses register at a volume paper never reaches; the first live phase is where you learn your own reaction, and the tuition for that lesson scales with size while the lesson doesn’t. (3) THE ERROR REASON (Stage 9): the sample’s deficit lived in its errors (−3.28R), not its method (+0.43R clean) — and live errors are the paper errors with money attached. Small size is what keeps a first live leak priced like the sample’s −1.30R pattern instead of like a catastrophe. None of the three says ‘you probably can’t trade.’ All three say: the evidence doesn’t care how brave the position is.

COMMON BEGINNER MISTAKES

  • Merging the two dials — Stage 4’s warning, now with money on it: quoting the 1–3% house band to justify a trade the 1% live floor already rejected.
  • Treating one contract as automatically ‘small.’ One contract of the $396 credit is 1.58% of the example figure — size lives in the structure’s printed maximum, not in the contract count.
  • Negotiating the cap for ‘the best setup of the month.’ The cap is a door written before entry (Stage 8); a cap that bends for quality bends for everything.
  • Budgeting the block at its good tail. The expected cost (−$341 on the sample’s arithmetic) is the planning number; the floor (−$426) is the limit; the good tail is a hope, and hopes are not budgets.

CHECK YOURSELF

Q1. At the live setting, a learner with a $25,000 certified figure looks at the 780/785 debit (max loss $296). The division says…

Q2. The block’s expected cost, on Stage 9’s sample expectancy, is about…

Q3. A learner’s certified figure is $9,000. At the live setting, the smallest course structure ($142 max loss) is…

DO IT — FILL YOUR SIZING CARD

From your own Stage 0 worksheet figure — not the example’s — compute: your 1% cap in dollars; each of your PlayBook structures’ printed maximum loss as a percentage of your figure; which structures (if any) are eligible at one contract; your R; your block’s expected cost, using your own paper expectancy per trade in R if your log supports one — the sample’s −0.24R if it doesn’t, labelled as borrowed arithmetic; and your −3R floor, in dollars and as a share of your tranche and your figure. Write it all onto Lesson 4’s protocol card. If the eligible list is empty, write ZERO IS AN ANSWER across the card, sign it, and file it as this stage completed the honest way. The card is the artefact either way.

Download this lesson’s cheat sheet (PDF)

STAGE 10 — OPTIONAL: FIRST TINY LIVE TRADES — ALL 6 LESSONS

  1. 64THE READINESS AUDIT: EVERY GATE, ONE CHECKLIST8 min read
  2. 65THE LIVE ACCOUNT, FUNDED7 min read
  3. 66TUITION SIZING: THE DIAL AT ITS FLOORYOU ARE HERE
  4. 67THE FIRST TEN: A PROTOCOL, NOT A DEBUT8 min read
  5. 68WHAT REAL MONEY CHANGES — AND WHAT IT MUST NOT7 min read
  6. 69RECORDS & TAXES, HONESTLY8 min read