Protean Signal, a replay room for Betfair markets

Field notes

The tool reads Betfair Historical Data files locally rather than connecting to the exchange, then reconstructs a market from its opening prices through in-play and close. Its practice orders are not simple chart annotations: they queue behind historical resting money, go inactive during suspensions, and can be exited through green-up, spread orders, stops, or trailing stops. A sample Beverley replay contains 30,769 frames across 17 hours of tape.