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Betfair Trading Signal

Steam Move Detector

WoM dominance + rapid tick shortening = steam signal on Betfair tick ladder Three runners · Adjustable thresholds · Manual inject
Weight of Money (WoM)Ratio of available-to-back vs available-to-lay at best prices. WoM > threshold = more backing than laying = price likely to shorten.
Tick VelocityRate of price shortening on the Betfair tick ladder. A steam move shortens N+ ticks within a fixed time window — the faster the move, the stronger the signal.
Signal ConfirmationBoth conditions must align: sustained WoM dominance AND rapid tick shortening. One alone is noise — both together is steam.
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Steam signals
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Drift signals
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Total ticks processed
0:00
Market time
WoM threshold 68%
Tick velocity (ticks/10s) 4
Market volatility Medium
Signal Log
Detection Algorithm
1. WoM GateWoM at best prices > threshold for 3 consecutive ticks
2. Velocity GatePrice shortened by ≥ N ticks in last 10 seconds on Betfair ladder
3. ConfirmationBoth conditions true simultaneously → STEAM signal fires
4. Drift MirrorWoM < (100 − threshold) AND price lengthening → DRIFT signal
5. Cooldown8-second lockout per runner after any signal fires