Average entry price and partial closes
Add to a position twice and close it in three parts — and the “entry” and “exit” on your screen are averages that may never have traded. Here is how they are calculated.
Average entry when adding
When you add to a position, the exchange recalculates the entry as a volume-weighted average:
Average entry = Σ(price × size) ÷ Σ size.
Buy 1 coin at 100 and 3 coins at 92: (100 + 276) / 4 = 94. Your break-even moved from 100 to 94 — plus fees, which now are paid on 4 coins.
PnL of a partial close
A partial close realizes PnL only on the closed part, against the average entry: closing 2 of the 4 coins at 98 gives (98 − 94) × 2 = +8 before fees. The remaining 2 coins keep the same average entry of 94.
Why the exit price is an average too
If the rest is closed at 101, the whole trade has an average exit of (98 × 2 + 101 × 2) / 4 = 99.5. That price may never have printed on the chart — it is just the weighted average of two exits. A trade card that shows “exit 99.5” is correct, even if the chart has no candle there.
See these numbers for your own trades
Connect an exchange and your trades load automatically — PnL, fees and funding per trade. The demo works without signing up.
Averaging down is a risk decision
Adding to a losing position improves the average entry but increases the size exactly when the trade is going wrong. Planned scaling-in with a fixed total risk is a strategy; adding “to get out at zero” is how small losses become large ones. A journal that tags such trades makes the difference visible.
In CheckMyProfit
Each trade shows its average entry and exit, and the parts it was closed in — with time, price and size of each part. The chart notes when entry or exit is an average of several parts.