Position Size Calculator

In 10 seconds: pick a tier that matches your confidence in the trade. The table is your size.

1. Type your total Account Balance (—).
2. Type the current contract price (—).
3. Look down the table — each row shows what Full / Half / Small / Lotto sizes to at your balance and price. Your Full tier right now: — = — deployed.
4. To customize a tier percentage, click into the % cell and type. Reset restores 10 / 7 / 5 / 1.

When the answer updates, the other three modes (Risk-Based, R-Multiple, Trim) pick up the same balance and price automatically.

• Full (10%) — highest-conviction setups. Trend, clean stop, catalyst, volume confirmation.
• Half (7%) — solid setup with one missing piece (e.g. clean chart but no news).
• Small (5%) — scalps, pre-earnings nibbles, thinly-traded tickers.
• Lotto (1%) — binary bets, 0DTE, earnings plays. Expect to lose most but the wins are multiples.

Sum of all four tiers = 23% of account deployed if you had every tier on simultaneously (—) — survivable even if all four hit max loss together.

Each tier is ~70% of the previous one (roughly geometric), which keeps the psychological weight proportional to the confidence gap. The 10% ceiling comes from the observation that most single-name trades shouldn't be able to blow up a diversified account — even a -50% drawdown on a Full tier is only -5% of your total capital.

These are starting points — aggressive traders push Full to 15%, conservative accounts drop Full to 5%. Adjust the %s to your risk appetite and the tiers re-size on every keystroke.

Tier is faster and capital-first: "I'm putting 10% of my account into this." It ignores the stop.

Risk-Based is slower and loss-first: "I'm willing to lose —, no matter how many units that buys."

At your current inputs: Tier (Full) sizes to — · Risk-Based sizes to —. Pick the smaller of the two if you're uncertain.

Use this mode when you have a specific stop in mind and want the largest position you can take without blowing past your max loss.

1. Balance — your total trading account (—).
2. Risk per Trade — the max % of account you're willing to lose on one trade. Pros use 0.5–1.5%; your current: — = — cap.
3. Entry Price — what you'd pay to enter (—).
4. Stop-Loss Price — where you'll exit if wrong (—). Must be below entry.

Answer at the top is your max position: —. If the loss-cap implied by your stop would let you buy more than the account can afford, the yellow warning fires.

Standard pro range is 0.5% to 1.5%. At 1%, you can lose 20 trades in a row and still have 80% of your starting capital. At 2%+, losing streaks become career-ending.

Your current setting: — = — max loss per trade. New traders should cut this in half (0.5%) until they have 50+ logged trades of data.

Risk-Based sizes on the downside only — how much can I lose, and how large a position does that allow? The upside is evaluated separately in R-Multiple. Keeping the two decisions apart prevents "talking yourself into size" because the upside looks fat.

Typical flow: check R-Multiple ≥ 2 → come here to size the position → open Trim Planner for exits.

The warning fires when the position would exceed 25% of your account — more capital than even your Full tier (10%). It happens when your stop is very tight relative to the entry.

Two options: (1) widen the stop to something more realistic — tight stops get wicked out by noise. (2) Reduce the risk % until the position shrinks. Never just ignore the warning — tight stops turn ordinary trades into binary bets.

It's the dollar cost of the full position divided by your balance. Even though your loss is capped at —, you still tie up the full cost (—) until you exit.

Watch it if you like to run multiple positions — two positions at 40% Account Used each = 80% of your buying power locked up simultaneously. Leave room to add to winners or open new trades.

Use this before you enter a trade to check if the reward justifies the risk. It doesn't care about position size — just the ratio.

1. Entry Price — the price you'd pay in (—).
2. Stop-Loss Price — where you'd exit if wrong (—). Must be below entry.
3. Target Price — where you'd exit if right (—). Must be above entry.

The answer is your R-Multiple: —. —

Rule: only take trades with R ≥ 2. Skipping a bad R is free; taking one costs you real money.

R-Multiple = reward you stand to gain divided by amount you'd lose if stopped out. "R of 2" means you'd win $2 for every $1 risked if the trade works.

It's the single most important pre-trade number. A trader with 40% win rate at R = 3 makes more money than a trader with 60% win rate at R = 1 — the math doesn't care how right you are, only how much you win versus lose.

• R < 1 — avoid. You'd need to be right far more than half the time to net profit, and trading is rarely that forgiving.
• R = 1 to 2 — marginal. OK if you have hard evidence of a >60% win rate on this setup.
• R = 2 to 3 — the professional minimum. Profitable even at a 40% win rate.
• R = 3+ — excellent. Survives long cold streaks.

Your current setup: — —

No. R is a pure ratio — it's the same whether you buy 1 contract or 100. Size is handled by Tier % or Risk-Based mode.

Think of R as the go/no-go filter: "Is this trade worth taking at any size?" If yes, go to a sizing mode to decide how big.

Then you don't have a trade, you have a hope. Minimum acceptable targets:

• The next level of resistance (prior day's high, round number, moving average).
• 1.5× ATR above entry (recent average daily range).
• The 20% rule (—) — always a valid minimum.

Without a target you can't compute R, and without R you're gambling, not trading.

Use this after you're in a trade to lock in the exit plan before emotions take over.

1. Entry Price — what you actually paid (—). Shared with every other mode.
2. Contracts held — how many you own. Auto-syncs to your Full tier (—) until you type your own number. If you sized via Risk-Based or bought a different amount, just type the actual count — auto-sync then stops. "Reset to Full tier" re-enables auto-sync.

The three cards show sell price, sell value, and profit for each trim stage:

• First trim (+20%): sell at —
• Second trim (+40%): sell at —
• Runner (+100%): sell at —

• +20% — fast enough to hit on most winners. Banks your first profit. Move stop to break-even here.
• +40–50% — confirms the move has legs; often coincides with next resistance.
• +100% — the "runner." Rare but sizeable — one of these pays for many small losers.

These aren't magic numbers — they're research-backed. Traders who trim at +20% outperform traders who "let it ride" by reducing max-drawdown variance even though average winners are smaller.

Rule of thumb with —:

• At +20%, sell 1/4 of the position. Move stop to — (break-even).
• At +40%, sell another 1/4. Start trailing the stop on the remainder.
• At +100%, the remaining 1/2 either hits your trailing stop or runs further. Let it breathe.

If you have fewer than 4 units, halve it: 1/2 at +20%, let 1/2 run.

You already trimmed at +20% and moved stop to break-even. The remainder reverses, hits your trailing stop at, say, +25% — still a profit. That's the plan working, not a failure.

The Trim Planner's job isn't to pick the top — it's to make sure a +30% move isn't a zero or a loss by the time you actually exit.