Definition of Fill
The execution of an order. When your order is "filled," it means the trade has been opened or closed at a specific price. The fill price may differ from the requested price during high volatility (slippage).
At a glance
Term
Fill
URL slug
fill
Category
Trading costs
Short answer
The execution of an order.
Deep dives
Full A–Z glossary
Example
Example: a 1.2-pip spread plus commission equal to 0.6 pip is ~1.8 pips of entry cost. Put “Fill” into the R:R math before judging a strategy.
Common mistake
Common mistake: ranking brokers on teaser “from” prices without measuring “Fill” on the same session and symbol.
Professional tip
Tip: log “Fill” at London–New York overlap and at quiet hours — the gap shows true strategy cost.
Practice tools:
Related terms
FAQ
The execution of an order.
All-in cost (spread, commission, financing) often hinges on “Fill”. Skipping it distorts profit/loss expectations.
Common mistake: ranking brokers on teaser “from” prices without measuring “Fill” on the same session and symbol.