Circuit breakers

Circuit breakers overview

Daily loss limit and max drawdown. The two account-level guardrails that disable trading when breached.

1 min readUpdated Jun 19, 2026

LucraX runs two user-level circuit breakers. They live one layer above strategies - when either trips, all live trading halts for that user.

Daily loss limit

Counts realized P&L from today's closed trades across all strategies and venues. When the total drops below -daily_loss_limit, the engine halts and refuses new entries until 00:00 UTC reset.

See Daily loss circuit breaker for full mechanics.

Max drawdown

Counts realized + unrealized P&L from the rolling-window peak. When drawdown exceeds the configured percentage, the engine halts until manually released or the equity recovers.

See Max drawdown circuit breaker.

What halts do

  • New entries from all strategies: blocked.
  • Open positions: left running (stops + targets still fire).
  • Manual close: still allowed.

Manual release

The Risk Settings page has a release toggle. Use it deliberately after diagnosing what tripped the breaker - clearing it without fixing the cause usually leads to another trip the same day.

Circuit breakers overview | Help Center | LucraX · LucraX