Question 1

What are the hidden costs of a trade?

Accepted Answer

Beyond the visible fee, you pay the bid-ask spread on entry and exit, slippage when your order moves the book, and funding if you hold a perp. Together these often exceed the headline fee, especially on illiquid pairs or in fast markets. They’re why frequent trading quietly bleeds accounts.

Question 2

Why does trade cost matter more for scalpers?

Accepted Answer

Because the costs are per-trade but your edge per trade is tiny. A 0.3% round-trip cost is trivial on a swing targeting 10%, but fatal on a scalp targeting 0.5%. High-frequency strategies live or die on minimizing spread, slippage and fees — the move itself is almost secondary.

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