Real tick-by-tick replay
A real past session, replayed tick for tick — the real consolidated tape and a real per-venue Level 2 montage. Not synthetic candles. The exact order flow that happened.
Live now — runs in your browser Re-trade real market days.
Re-trade real market days.
Tick for tick.
A browser-based replay simulator for daytraders. Practice your execution on the real tape — Level 2, halts and all — until being green is a habit.
The desk
Everything a real platform has.
retrader rebuilds the tools you trade with — the tape, the montage, the scanners, the blotter — wired to real historical data you can replay as many times as it takes.
Fills that punish chasing
Momentum and chase slippage, thin-book slippage, queue position. Halts and LULD fire when they actually did.
A review that grades you
Every round-trip auto-graded — MAE, MFE, slippage, capture %. Know how you traded, not just the P&L.
Scrub the tape
Grab the tape or the slider and scrub the day; charts update live. Re-run a day until you nail it.
A real multi-window desk
Platform, charts, gainers/HOD scanners, blotter — synced windows. Your journal auto-saves across devices.
The reps that compound
You don’t read your way to good execution.
You drill it. Every card here is something retrader puts in front of you, on a real day, until it’s a habit.
How much of the move you actually kept. The number that separates a good read from a good trade.
Capture %Maximum adverse excursion — the heat you took before it worked. Learn to size for the heat, not the hope.
MAERead the per-venue montage like the pros: where size is hiding, who’s refreshing, when the bid is real.
Level 2How much of the move you actually kept. The number that separates a good read from a good trade.
Capture %Maximum adverse excursion — the heat you took before it worked. Learn to size for the heat, not the hope.
MAERead the per-venue montage like the pros: where size is hiding, who’s refreshing, when the bid is real.
Level 2The origin storyStart your reps
“I built retrader for myself, to drill the days I kept fumbling. I’ve been green every day since I started using it.”
— the founder, an active low-float & IPO daytrader
That’s not a promise of returns — markets don’t work that way. It’s proof that the method works: enough honest reps on the real tape, with a journal that tells you the truth, and execution becomes a habit instead of a hope.
0%replayable, repeatable
$0at risk while you learn
0+venues in the montage
Pricing
Start free. Go Pro when it ships.
The simulator is live today. Billing and the full day library are the next milestone — start practicing now, and you’ll be first in line for Pro.
Free
$0To try the feel
Start free- Synthetic practice mode
- A few sample real days
- Full hotkey order entry
- Trade Review on your fills
Pro
TBDComing soon
Join the waitlist- The full real-data day library
- Unlimited journal history
- Every scanner & window
- Journal synced across devices
retrader is practice and education on historical data — not live trading, and not financial advice. Trading real markets carries real risk of loss.
FAQ
Straight answers.
Yes. retrader replays real historical trading days tick by tick — the real consolidated tape and a real per-venue Level 2 montage. It’s the order flow that actually happened, not a synthetic simulation.
No. retrader runs entirely in the browser. Open a day and start trading — nothing to download, nothing to configure.
No. Everything is practice on historical data, so there’s no real money at risk and nothing to lose. It’s a training tool — education and reps, not live execution or financial advice.
US equities, with a focus on the active small-caps — low-float runners and IPOs — where the tape moves fast. That speed is the point: it’s where execution reps matter most.
As many times as you want. Days are processed once and cached, so re-practicing is instant and free. Run a setup until you nail it, then A/B your own decisions.
Automatically. Every round-trip is graded and stored to your account, and it follows you across devices — open the same journal on any machine.