A gap is not a zero
Sometimes a close is certain but its amount never comes back from the broker. Tradeus records that the trade closed and that the amount is unknown. It is never counted as $0 — not in a sum, not in an average, not in a win rate — because a zero would quietly drag every one of those toward the middle. It shows as —, and each panel says how many of its trades are in that state.
The equity curve does not end at the net P&L
Net P&L adds up your closed trades. The equity curve follows the account's own cash: on a day where the broker reported a balance movement, that movement is the day. It carries fees and anything closed at the broker without a reported amount, so the two legitimately end at different figures.
Where cash and trades disagree, cash wins — it is the number your prop firm is looking at. The curve is labelled and footnoted on the page for exactly this reason.
On a spot account — a crypto wallet, a cash share account — buying is not a loss, so the curve does not drop when you buy. A margin account only reserves margin when it opens, and its cash stands still; a spot account spends it, and reading that spend as a day's result would show the whole purchase price as a loss while you hold and as a profit when you sell. The figure the curve uses there is your cash plus what your holdings cost, so opening leaves it flat and only the market moving, or a fee, moves it. What the position is worth above or below its cost shows as open P&L, the same as anywhere else.