Stop-Hunting Dealing Desk Algorithms
The Formal Definition
A predatory market-making practice where internal dealing desks exploit visibility into client stop-loss clusters to artificially widen internal bid-ask spreads or quote aggressive spikes, triggering stop-out orders before market prices normalize.
Internal Spike Condition: Dealing Desk Internal Spread > Interbank Core Spread + Spread Spike Triggering Resting Retail Stops
Cole Barrett's Reality Check
The Unvarnished Bottom Line"Stop-hunting is not paranoia; in unregulated B-Book bucket shops, it is code written directly into the server plugins. The broker's dealing desk sees exactly where retail traders clustered their stop-losses. During quiet night sessions, they spike their internal spread by five pips, trigger the stops, take the cash, and drop the quote right back down."
Interactive Simulator: Test the Math
Real-World Example: Scenario Breakdown
Examining the real numbers for: Resting retail stop-loss order placed 6 pips below key support level during a quiet Asian trading session
| Execution Metric | Raw ECN Liquidity Account (Pepperstone) | Unregulated B-Book Dealing Desk |
|---|---|---|
| Fee / Rate | Transparent commission | $0.00 'commission-free' |
| Spread / Buffer | Spread remained tightly bound to interbank market feeds (0.2 pips) | Broker artificially spiked internal quote 7 pips lower for 2 seconds |
| Execution / Status | Market price never touched the support level | Triggered retail stop-loss at lowest point; external market never moved |
| Total Cost / Result | Clean execution without counterparty interference | Victim of dealing desk stop-hunting algorithms |
How Brokers Weaponize This Term
Offshore CFD brokers deploy server-side plugins that monitor client stop-loss densities, expanding spreads during off-hours to trigger automated stop liquidations that convert directly to broker revenue.
Broker Evaluation Matrix
Cole Approves
Pepperstone / IC Markets: Pure agency No-Dealing-Desk (NDD) execution connecting to Tier-1 liquidity providers with audited execution logs.
Read Audit →Cole Flags / Avoids
Unregulated Offshore Operators: Operates internal dealing desks with documented histories of quoting proprietary price spikes that diverge from lit interbank feeds.
View Trap Details →Frequently Asked Questions
How can you prove a broker hunted your stop-loss?
Compare your fill price and time stamp against independent third-party market data feeds (such as Bloomberg, Reuters, or public lit exchange prints).
Why do stop hunts happen more frequently during illiquid market sessions?
Because thinner real trading volume allows dealing desks to widen internal spreads without immediately standing out against lit exchange pricing.