Why it matters
Why slippage matters to traders
Slippage changes realized risk and reward. During fast markets, a stop can execute beyond the planned level, while market entries can fill after price has already moved.
Practical use
How traders use it
Account for typical slippage in testing, use appropriate order types, understand the liquidity of the instrument and be cautious around scheduled news, market opens and other periods where price can move rapidly.
Common mistake
What to avoid
A stop order controls the trigger, not necessarily the exact fill price in every market condition. Treating stop distance as a guaranteed maximum cash loss can therefore understate execution risk.
Use the concept, not the label
Trading terminology is useful only when it improves a repeatable process. Define the concept clearly, test how you use it, pair it with risk management, and avoid turning chart language into certainty about what the market must do next.