Spread, Commission, and Swap: The Real Cost of a Trade
Break down the hidden costs around every trade so your strategy accounts for friction before you judge performance.
Overview
A trade can be directionally right and still underperform because costs were ignored. Small frictions become big performance leaks when repeated often.
How costs show up
Spread affects you immediately because you enter across the bid and ask. Commission may be charged separately per lot, and swap applies when positions are held through rollover.
Scalpers and swing traders feel these costs differently, so the right strategy measurement depends on style.
Why this matters for strategy building
If your average target is tiny, even normal spread and slippage can erase the edge. If you hold longer-term trades, swap can quietly distort return expectations.
Always test your method with real execution costs in mind, not with idealized chart screenshots.
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