Fees are charged on the whole position, twice. Price them before the trade does.
The gap between maker (resting limit orders) and taker (market orders) fees looks tiny per trade and enormous per year — an active trader on $10k positions can hand the exchange a four-figure sum annually purely for impatience.
Resting limit orders provide the liquidity that makes the book usable, so exchanges reward them with lower fees or rebates; market orders consume liquidity and pay for immediacy.
Fees apply to position value (margin times leverage), so raising leverage with the same margin raises the fee bill proportionally.
Perpetuals exchange funding every 8 hours, and market orders pay slippage. The break-even and funding-cost calculators price the full round trip.
Free, no signup, runs entirely in your browser. Educational tool — not financial advice. Practice the setup risk-free on the MarginPad paper-trading terminal before putting real money behind it.