Stop-Losses in Day Trading
Understand stop placement, order types, slippage and why a stop price is not a guaranteed execution price.
A stop is an exit mechanism, not insurance
A stop-loss is a predefined exit intended to limit exposure when price moves against a position. The critical distinction is between a stop price and the eventual execution price. In fast or illiquid markets they may differ materially.
Stop-market and stop-limit orders
A stop-market order generally prioritizes getting out after the trigger is reached, but the fill can be worse than the stop price. A stop-limit order controls the acceptable execution price more tightly, but it may not execute at all if price moves through the limit. Traders need to understand the exact order behavior supported by their broker and venue.
Where stops come from
Stops can be based on market structure, volatility, time, a thesis invalidation condition or a predefined monetary boundary. A risk-first workflow chooses the logical exit first and then adjusts position size to fit the risk budget.
Failure modes
- Moving a stop farther away because the loss feels uncomfortable.
- Setting an arbitrarily tight stop simply to trade a larger position.
- Assuming a stop guarantees the maximum loss.
- Ignoring overnight, halt or gap risk.