Replay practice for Betfair traders

Run the market again.

Protean Signal replays real Betfair markets on a full ladder, tick by tick, from the first price to the close, in play included. Horse racing first; any market in your Historical Data download loads the same way. Read what happened, trade the tape, log the trade, read the review. No live market, no waiting, nothing sent to Betfair.

Join the pilot See how it runs

T-14m 28sBeverley 14:17 · 5f Mdn Stks17 h of tape · 30,769 frames · in play to the close

The Protean Signal replay screen: five runner ladders for Beverley 14:17, the clock at T-14m 28s, the transport bar below.

DATA

Any market in the file

Import the tar you download from historicdata.betfair.com. Racing, greyhounds, cricket, football: if it is in your download, it loads. WIN and PLACE pair up for racing.

WHOLE

First price to the close

The whole market, not a window: the quiet hours at a heartbeat, the last twenty minutes at 50 ms, the off, in play, the close. The tape opens at T-16 minutes with the day behind it.

FILLS

Orders that queue

A practice order sits behind the money that was really resting at that price and fills only as the tape eats through it. A cross fills at once, as it would live.

BETFAIR

No API. No bets. No Betfair login.

Protean Signal never connects to Betfair. It reads files on your machine; your Betfair account is never involved and nothing leaves your computer.

How it runs

From a download to a logged trade.

Five steps, in this order, every time. The picture on the right follows the step you are reading.

The product, in your browser

Beverley 14:17, from sixteen minutes out to the close. This is the board as it ships.

Press play or scrub the tape. Click a pink cell to back, a blue one to lay, and watch the order queue behind the money that was really there. Green up, spread the exit, arm a trail, open the story. Only the ledger stays in the app.

The real board, running on the real tape, with practice fills simulated the way the app does it. Nothing is sent anywhere.

Import

Drop in a Betfair Historical Data download. The library lists every market by day: the course or the event, the market, the sport, the field. It shows which days you have already worked.

Read what happened

Before you press play: who was backed in from ten minutes out, who drifted from four, the off, the result and the BSP. Every line is a moment; click it and the tape jumps there.

Run the market

Five ladders, the weight of money on each, price and volume over the whole day, the clock to the off. The tape opens at T-16 minutes with the whole day behind it and runs on through in play to the close. Half speed to ten times.

Trade it

Click the ladder as you would live. Back, lay, green up, spread your exit across ten rungs, arm a stop, or switch on a trailing stop with your own arm and trail distances. Every order queues behind the money that was there. When the tape hits a suspension the ladder greys out until the market reopens, as on the exchange.

Log and review

One press books the market into your practice ledger. The review reads back win rate, average win against average loss, where the money came from and how you got out.

The library: race days, markets across sports, a practice plan and recent reviews.

The story panel beside the ladders: the result, jump chips, and the moves with their times.

The replay screen in play: the clock reads in play, the favourite trading at 1.03.

A close look at the ladder cells: back money in pink, lay money in blue, the last traded price in yellow, traded volume in green.

The review page: by odds band, back against lay, how you got out.

01 · Import

Why replay

Racing keeps its own hours. Your practice doesn't have to.

ANY HOUR

The card runs 1pm to 9pm. You don't.

Practise at six in the morning or after midnight, in any order, at any speed. A quiet Tuesday can hold a Saturday's worth of races.

TWICE

The same market, again.

Trade a race, then scrub back and watch what the book did around your entry: the money that arrived, the money that left, the print that told you. Then run it again and do it differently.

LOGGED

Numbers, not impressions.

Every practice market is logged. The review reads your losses against your wins, by odds band, by side, by the way you got out, so the leak has a name.

A two-runner cricket Match Odds market on the same ladder, with its story panel open (sample data).

Any market

Horse racing is the focus. The ladder isn't fussy.

A Betfair market is a Betfair market: the same book, the same tick ladder, the same story of money arriving and leaving. A two-runner Match Odds market loads on the same board as a ten-runner maiden. Greyhounds, cricket, football, tennis: if it is in your download, it plays, in play included.

The cricket market shown is sample data. Everything else on this page is a real Beverley race from a real tape.

The review

The numbers your P&L hides.

A day's practice comes back as one page. Not a profit figure, the shape of it.

Win rate, average win, average loss, and losses as a multiple of wins.
Where the money came from: by odds band, back against lay.
How you got out: greened up, spread, by hand, or still open when you logged it.
The worst five trades, named, so you can scrub straight back to them.

A practice review page for Saturday 4 July 2026.

On the roadmap.

Planned, not shipped

Blind-call drills
The tape freezes at a moment of your choosing. You call the next move. The tape reveals it and keeps the score.
Rule backtests
Write a rule, run it across a season of tapes with the same queue-aware fills, read the result before you risk it.
Windows
The pilot runs on macOS. The Windows build follows, because that is where most ladders live.
Sign in with an account
Today your seat is a licence key that expires with your subscription. Next, an account: sign in once and the key renews itself while you pay.

For Betfair

Built on the data Betfair already sells.

Protean Signal reads the Historical Data files a customer downloads under their own account. It makes no API-NG or Stream calls, places no bets and redistributes nothing. Every Protean Signal trader is a Historical Data customer first, and the Pro tier is what makes the ladder worth replaying.

Demand for Advanced and Pro

The tool is only as good as the file it is given. Full-depth, 50 ms tapes are the product's reason to exist.

No account, no API

Nothing here acts on a customer's behalf. Protean Signal never holds a session, never sees a key, never places an order.

Local to the customer

Files stay on the customer's machine. No copies are served, shared or resold, and no data leaves the computer.

Pilot

Bring a download. Run ten races. Tell us what the ladder got wrong.

The pilot is a handful of traders with their own Historical Data downloads. You get the build and a direct line; we get the truth about whether the tape feels like the market you remember.

Pilot

Freefor the first testers

Your own Betfair Historical Data download, any tier, any sport. macOS for now.

Whole-market replay, the story, practice orders, the ledger and the review
A seat: a licence key that expires and is renewed while you subscribe
Direct line to the person building it

Ask for the pilot build

After the pilot: £19 a month or £149 a year (planned). The software runs while the seat is live.