Skip to content

Everyone else scores your psychology. sizeforzero reads it back.

Unlimited trades, every account, full analytics and calendar — free forever. Turn on AI when you want it to read the notes you wrote and tell you, in plain words, what you keep doing to yourself. Not just another score.

Wealthsimple auto-sync, liveUnlimited trades, freeYour notes are never sold
The sizeforzero calendar: a trading month tiled day by day, each day green or red by its closed profit and loss.
The sizeforzero calendar on a phone: a trading month tiled day by day, each day green or red by its closed profit and loss.
The real game

Their AI tags your trade. Ours reads what you wrote.

Most traders lose to the same three things — and a spreadsheet records all three without once telling you.

  • Revenge trading — sizing up to win it back.
  • Cutting winners early, letting losers run.
  • Never noticing the pattern until it has cost you.

The same losing trade, two readings. One stops at the number. The other reads the human who wrote the note.

What every journal sees

Nasdaq · −US$320 · · held 14m ·

tagged: loss · revenge · oversized

What sizeforzero reads

“Tape went dead after the open, got bored, doubled in to feel something.”

From sizeforzero: This is the third Friday you’ve sized up out of boredom, not conviction.

from the note you wrote on this trade
In action

The whole journal. Real screens, real data.

No mockups. This is the product you get for free — Iris’s read is the only thing behind Pro.

The analytics page: this month’s realized profit and win rate, a breakdown of which setups made and lost money, and a plain-English read of how disciplined the trading was — all from your broker data.

The numbers — and where your edge comes from.

Win rate, profit factor, and a quick read of how you traded, drawn from your broker data alone. Numbers like these, every journal has. The letter that reads the notes you wrote back to you — written in prose from your own words — is the part only we write.

A calendar day view: each trading day tiled green or red by its closed P&L, with a day drilled open to its trades.

Green days, red days, the streaks.

See the month at a glance — green when you closed in the green, red when you didn’t. Click any day to drill into every trade you closed.

The Reflect page showing a sample AI letter reading a trader’s own notes back to them in plain prose.
Sample reflection

It read the sentence where you admitted you were bored.

Turn on Pro and Iris reads the notes you wrote — the why behind each trade — and answers in plain words. A read of your own mind, kept forever.

A taste

Hear a letter before you sign up.

Pick a trader and read the kind of letter sizeforzero writes. It’s a sample — yours is written from your own trades.

Pick a trader, hear their letter
Sunday letter — sample

The losses this week share a tell — each one came right after a red morning, sized up while the first trade was still stinging. The note you wrote on the worst of them said it plainly: “want it back.”

A sample letter — not generated from real data. Yours is written from your own trades.

Reflections, not advice — a description of your own patterns, never a recommendation to buy or sell.

Want one written from your own trades?

Start free — no card
What’s inside

They built the journal people abandon. We built the one people keep.

Not 100 reports you’ll never open. The handful that earn their keep when you re-read them next year.

Three figures, not a hundred

Win rate, profit factor, and closed-trade volume — the exact triad the Reflect page renders, sample figures shown. Numbers your eyes can read at a glance, and a letter that explains them in plain words.

Every trade, with intent

Thesis and a note on every execution — captured the moment you take or close the trade, not in a separate ritual you forget. Your reflections live where they happened.

And it reads what a spreadsheet can’t.

  • A spreadsheet is a data-entry job you’ll quietly abandon by week three.
  • One broken cell silently corrupts your equity curve for weeks.
  • And it will never notice the trade you took just to feel something.
Reliability

Your trades land right — and follow you everywhere.

Wealthsimple syncs automatically every day. For every other broker, CSV import is a drag away — and we’ve spent release after release making it correct: every trade lands once, no phantoms, no miscounts. Your data leaves whenever you want — full CSV export, no lock-in. More native brokers are rolling out.

Wealthsimple auto-syncAny broker via CSVMore brokers rolling out

And it’s just as calm on your phone — the whole journal, at 375 pixels.

The sizeforzero dashboard on a phone: today’s numbers, the equity curve and recent trades, laid out calmly on a narrow screen.

From the founder

Built solo in Canada. No VC, no investors, no data sale ever.

We’re early. There are no testimonials here yet because we won’t invent them — and we won’t quote a trader who didn’t say it. If you switch, you’re among the first, and your feedback shapes what ships next.

Your notes are yours.

Never sold, never used to train models, never used to reverse-engineer your edge. Read only to write your letters. Passwordless auth, so there’s no password to leak.

Never soldNever trains a modelPIPEDA + CCPAPasswordless auth
The switch

Why traders switch

The other journals added AI — pointed at your numbers. We point it at your words — the notes you actually wrote, read back to you.

Feature
Other journals
sizeforzero
Reads the notes you wrote back to you
No
Yes
A letter in prose, beyond the score
No
Yes
AI always-on on Pro — never metered or rationed
No
Yes
Letters kept forever
No
Yes
CSV export, no lock-in
On the roadmap
Yes
Native broker auto-sync (Wealthsimple today)
Yes
Yes
100+ metrics dashboards
Yes
No

Soon = on the public roadmap. We label it explicitly instead of leaving it ambiguous.

FAQ

Honest answers, not marketing.

Start

You don’t need 100 metrics. You need to see your own mind clearly.

The whole journal is free. You pay only to make it talk back — always-on, never counted.

Free — the whole journal

Freeforever

Unlimited trades, every account, Wealthsimple auto-sync, the full analytics with the equity curve and pattern scan, calendar P&L, CSV in and out — and two AI reflections a month.

No credit card. Forever.

Start free — no card

Pro

US$15/ month

AI always-on — a daily reflection, the Sunday letter written from your week, a read on every position, the monthly digest. Never metered, never rationed.

30-day free trial, card upfront, cancel anytime.

See full pricing

Pro annualBest value

US$150/ year

The full Pro journal at US$12.50 a month — two months free versus paying monthly. One charge a year, then forget about billing.

Serious AI, without the serious price.

See full pricing
Start free — no card

Cancel by clicking once — no retention maze. See the sample letter →

For informational purposes only. Not financial advice. Past performance does not guarantee future results.