StaySized
For prop firm traders

Know how much to risk. Before every trade.

StaySized keeps your prop accounts inside the rules, sizes every trade from your own results, and tells you honestly what is working and what is not.

Join the free betaSee how it works
Rules for 17 prop firms built in. Works with Claude and ChatGPT.
StaySizedTodayCalendarJournalForecastRunway LabAnalyticsMonthly RecapFirms & Rules

Today

Forecast · bullish
All 3 conditions met. Clear to execute.
$376Max risk, next trade
$1,503Buffer to the floor
1 / 2Trades today
+$2,340This month
Lucid Flex 50k · Eval
Example account
● Safe
$51,592
Floor $50,089Buffer $1,503
Topstep 50k · Funded
Example account
● Safe
$52,210
Floor $50,000 · lockedPayout now $1,105
How it works

Four answers every prop trader needs, on one screen.

Live rules

Where your floor is. Right now.

Pick your firm and account. The trailing drawdown, the lock, the target and the consistency rule load automatically, and every trade updates your buffer, your max risk and how many micros it allows.

Runway Lab

How much to risk, from your own trades.

Paste a backtest or use your journal. Thousands of simulated paths under your firm's exact rules give you one answer in dollars and contracts, plus your odds of passing and of keeping the funded account.

Reality check

Backtest versus live, side by side.

Most traders trade worse live than in their backtest. StaySized measures the gap, tells you whether it is bad luck or something real, and shows what closing it is worth.

Monthly recap

Your month, wrapped.

Net result, best and worst trade, how your A, B and C setups did, and three rules for next month. Played like a story, saved as a card you can share.

Talk to your journal

Journal in ten seconds.

Most traders stop journaling after two weeks because the forms take too long. With StaySized you just tell your AI how the trade went. It fills in every field, and the analytics keep getting sharper.

ClaudeChatGPTAny app that supports MCP
Lucid #5, 15:41 long on NQ after the 30m tap. Closed at 1.5R, +$410. Quality 8, SMT and key level swept. Entered one candle late.
Logged to Lucid Flex 50k · Eval. Your buffer is now $1,913 and max risk on the next trade is $478. Late entries cost you 0.56R per trade on average this month.
SideLong
Result+1.50R
Quality8/10
What is costing me the most money right now?
Everything in one place

Built for the way prop traders actually work.

Before the open

Forecast and check-in

Bias, draw and the conditions you need to see. Rate sleep, mood and focus. Any score below 6 and today is a no-trade day.

17 firms

Firm rules, compared

Drawdown, lock, consistency, payouts and prices side by side, from each firm's official pages and checked daily for changes.

Every day

P&L calendar

Every account or just one. Daily and weekly P&L, with each day's trades and notes one hover away.

What works

Analytics that explain themselves

Which confluences carry your edge, which mistakes cost you, and whether your own quality score predicts anything.

Learn

Short guides with quizzes

Runway sizing, scaling to more accounts, the pre-open forecast. Each ends with four questions to check you got it.

Grade A to F

A verdict on your trades

Sample size, edge, luck and stability, each graded with the rule shown. No black box.

Lucid TradingTopstepApex Trader FundingTradeifyMyFundedFuturesTake Profit TraderFTMOThe5ersFundedNextAlpha FuturesBulenox+6 more
Honest by design

It tells you what you need to hear.

Plenty of tools show you only the good news. StaySized says it when your sample is too small, your edge is thin or your live trading drifts from your backtest. Then it tells you what to do about it.

  • “Only 25 trades. Too few to trust any result.”
  • “Your edge is thin. Small size mistakes can wipe it out.”
  • “Live is clearly worse than the backtest. Size for the live numbers.”
  • “None of the tested sizes is safe with these trades.”
Pricing

Free while we build it with you.

Beta testers shape what comes next and keep a lower price after launch.

Beta
$0
  • Everything in StaySized
  • Connect Claude or ChatGPT
  • Direct line to the founder
Join the beta
After launch
$29 / month, planned
  • Unlimited accounts and firms
  • Runway Lab and reality check
  • Recaps, analytics, guides
Price not final. Cancel any time.

Trade your plan. Keep your accounts.

Leave your email and we will send you an invite when the next beta spots open.