What is toxic flow in prop trading?
Quick answer
Toxic flow is trading that profits from weaknesses in the setup rather than from market skill: latency arbitrage, exploiting delayed or wrong prices, tick scalping, coordinated hedging across accounts, or copying the same signal across many funded accounts. It produces payouts that real markets would not.
Detailed answer
Typical signs:
- Very short holding times with high win rates.
- Trades opened just before price moves the simulator lagged.
- Opposite positions on linked accounts.
- Identical trades across many accounts.
- Profits concentrated around data errors or spikes.
Defences:
- Reliable, low-latency price feed.
- Minimum hold time and order frequency rules.
- Review of flagged accounts before payout.
- Clear prohibited strategies in your terms.
PropExecutor includes rules aimed at these patterns, such as minimum hold time (flag or breach) and maximum orders per day, and records flags per account for review.
Responding to it
Act on patterns, not single trades. When several signs appear together on one account or a group of accounts, review the full trade history before any payout, and apply your prohibited strategies policy consistently.
Document each case with the trades involved, so similar patterns are handled the same way next time and the reasoning is available if a trader disputes the decision.
PropExecutor team · Updated
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