Slippage
and Latency
Execution quality depends on market depth, routing speed, and order type behavior. Slippage and latency metrics make those hidden costs measurable.
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Latency
Sources
Breakdown of delay points from terminal click to final fill.
Execution delay is cumulative. Each stage in the path from platform to liquidity venue adds milliseconds that can materially change fill outcomes during fast movement.
Consistent measurement requires stage-level segmentation. A single latency number hides where delay actually occurs and blocks practical diagnostics.
Latency Map
Monitoring Stack
Median latency is useful, and tail latency explains most extreme fills during fast news windows.
Slippage
Scenarios
How different regimes and order types produce different fill outcomes.
Slippage probability rises when the order book thins or reprices rapidly. Session rollover, macro releases, and weekend gaps are common high-friction conditions.
Useful diagnostics classify slippage by order type and regime, then compare expected versus realized cost per trade cluster.
Classification quality improves when fills are grouped by timestamp, spread state, and volatility bucket. This method separates random noise from repeatable execution friction.
High-Friction Scenarios
Fast quote updates reduce available size at expected prices and widen fill variance.
Liquidity providers rotate books and spreads widen temporarily, reducing stop precision.
Market reopens at a new price level with no tradable ticks in between.
Sparse depth causes larger price impact for moderate order sizes and increases partial-fill frequency.
Momentum bursts can skip expected levels and produce execution at unfavorable ladder steps.
Temporary depth removal can amplify slippage even with moderate order size.
Slippage Classification Model
Frequently Asked Questions
What is slippage in forex execution?
Slippage is the difference between expected execution price and actual fill price. It appears when available liquidity changes between order submission and fill.
What is trading latency?
Latency is the delay between sending an order and receiving execution confirmation. It includes platform, network, broker, and liquidity-provider components.
Can slippage be positive and negative?
Both outcomes are possible. Positive slippage fills at a better price, while negative slippage fills at a worse price than expected.
Is this page financial advice?
This page explains execution mechanics for educational purposes. It does not provide personalized investment recommendations.
Continue Your Execution Science
Anatomy of an Order
Execution friction starts in the order-routing chain; this module maps each handoff.
Order Types & Stop Loss
Different order types produce different slippage behavior under volatility.
Backtest vs Forward Test
Include slippage and latency metrics to validate model assumptions in live conditions.
Trading Sessions & Liquidity
Session transitions and low-liquidity windows strongly affect fill quality.
Robots Rankings
Use live EA execution logs to benchmark spread sensitivity and latency-side outcomes.