Execution Models & Slippage Control

Overview

The Execution Layer defines how an EA interacts with the market. It controls order routing, slippage, spread filters, retry logic and latency checks. Even the best strategy can fail if execution quality is poor. A strong execution model ensures that trades are executed efficiently, safely and consistently across different market conditions.

Execution Models

Quantisca EA Labs supports multiple execution models, each suited for different strategy types and market environments.

Market Execution

Orders are filled immediately at the best available price. Fast but sensitive to slippage during volatility.

Limit Execution

Orders are filled only at the specified price or better. Zero slippage but risk of missed entries.

Stop Execution

Orders trigger once price reaches a defined level. Useful for breakout strategies but can slip heavily.

Hybrid Execution

A combination of limit and market execution. The EA attempts a limit fill first, then falls back to market execution if conditions change.

Slippage Control

Slippage is the difference between expected and actual execution price. Controlling slippage is critical for scalpers, high‑frequency systems and strategies with tight stop‑losses.

• • Maximum allowed slippage: EA rejects trades exceeding the threshold.
• • Dynamic slippage limits: thresholds adjust based on volatility.
• • Spread filters: block trading when spreads widen abnormally.
• • Latency checks: prevent execution during network delays.

Spread & Execution Filters

Spread and execution filters protect the EA from entering trades during unstable market conditions.

• • block trading during news spikes
• • enforce maximum spread thresholds
• • avoid execution during rollover hours
• • detect abnormal liquidity conditions

Retry Logic

Retry logic ensures that the EA handles temporary execution failures safely.

• • retry only under safe spread conditions
• • limit the number of retries
• • enforce cooldown periods between attempts
• • cancel orders if market conditions deteriorate

Latency Awareness

Latency affects execution quality, especially for fast strategies. The EA monitors:

• • ping time to the trading server
• • order execution time
• • network stability
• • broker‑side delays

Checklist

Before deploying an EA, confirm that the execution layer meets all requirements:

• • Is slippage controlled and monitored?
• • Are spread filters active?
• • Does the EA avoid trading during unstable conditions?
• • Is retry logic safe and limited?
• • Are latency checks implemented?
• • Does the execution model match the strategy type?

Summary

Execution Models & Slippage Control ensure that an EA interacts with the market safely and efficiently. A strong execution layer protects the strategy from poor fills, volatility spikes and unstable conditions — making it essential for long‑term performance and reliability.