Holding a long and a short in the same pair does not normally cancel the financing. Each leg is rolled over separately, so the account receives one swap and pays the other — and because the long and short swap rates are quoted with a markup on both sides, the pair usually nets to a debit rather than to zero.
This is what makes "locking" a losing position an expensive way to postpone a decision: price risk is frozen, financing is not, and a weekend rollover charges several days at once. Swap-free accounts change the arithmetic without removing it, often replacing the swap with an administration fee after a holding period. The contract specification lists both swap sides per instrument; the net of the two, multiplied by the nights you expect to be locked, is the real cost of waiting.
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How to Measure Risk Across All Your Open Positions
Risk per trade only describes one ticket. How to add up what your stops are worth, split the book into currencies, and read the margin figures the platform is already showing you.