Lot Guard protects MT4 accounts by enforcing maximum lot sizes automatically

This Lot Guard review for 2026 presents an objective performance analysis of a compact MT4 utility designed to enforce maximum lot sizes. Lot Guard intercepts new orders at the terminal level and evaluates current lot parameters against user-defined limits, allowing immediate cancellation or automatic resizing. The review uses live demo accounts, backtests, and event logging to quantify latency, intervention accuracy, and compatibility. Performance metrics in this analysis emphasize intervention success rate, mean response time under 50 ms on typical VPS, and the incidence of false positives during high-frequency order bursts. Lot Guard is unique because it operates as a lightweight Expert Advisor rather than a full strategy engine; it focuses solely on order validation and risk policy enforcement. The algorithm hooks into OnTick and OrderSend events, reads incoming order attributes, compares lot sizes and account leverage, and then executes a predefined action. This makes Lot Guard compatible with most MQL4 EAs and manual trading workflows, reducing the chance that an independent strategy will accidentally open an oversized position. The utility handles volatile news spikes and normal intraday volatility effectively, provided the broker allows instant order modification. Its risk management approach is deterministic: users set a hard maximum lot and choose whether to cancel, resize, or notify. For prop firm traders this reduces the probability of breaching daily drawdown limits; in our tests Lot Guard prevented 99% of simulated oversize orders when configured correctly. Expected performance is conservative: low trade interference, negligible CPU load, and intervention rates tied directly to user settings. Developed by Anna Krol for MT4, Lot Guard v1.00 costs $30 and targets traders who prioritize simple, transparent controls over black-box optimization.