How is the average buy price calculated on Pluang?
Your average buy price on Pluang is a weighted average: the total you paid for all your purchases of an asset divided by the total units you bought. Every purchase counts in proportion to its size, so a large buy moves the average more than a small one. Buying more at a lower price than your current average pulls it down, which is often called averaging down, and buying more at a higher price pulls it up. Selling part of a position does not change the average price of the units you keep; it only reduces how many you hold. Your unrealised profit or loss is measured against this average, which is why it shifts whenever the average changes. A few events can also recalculate it without a purchase: a stock split, where Pluang adjusts the average automatically on the effective date, and Crypto Staking rewards, whose coins are added to your holdings at their value when they are paid out.
Formula: Average buy price = total amount paid for all purchases ÷ total units bought
Worked example (simplified)
| Purchase | Units | Price per unit | Amount paid |
|---|---|---|---|
| First buy | 10 | Rp1,000 | Rp10,000 |
| Second buy | 10 | Rp800 | Rp8,000 |
| Total | 20 | — | Rp18,000 |
Average buy price = Rp18,000 ÷ 20 = Rp900. The second purchase at a lower price pulled the average down from Rp1,000 to Rp900. If you then sell 5 units, you keep 15 units and the average stays at Rp900.
- US Stocks are averaged in US dollars. Their average purchase price is shown in USD, so it is not affected by the exchange rate you paid when you converted Rupiah into dollars.
- Stock splits keep the total the same. After a split, you hold more units at a proportionally lower average price, so the total cost of your position doesn't change.
- Staking rewards enter at payout value. When Crypto Staking rewards are distributed, the reward coins are averaged in at their value on that day, and that value is counted in realised profit and loss.
Related questions:
Q: What does averaging down mean?
Averaging down means buying more of an asset you already hold at a price below your current average, which lowers your average buy price. In the example above, buying 10 more units at Rp800 brought the average down from Rp1,000 to Rp900. A lower average means the price needs to rise less before your position shows a profit, but it also means you have committed more money to the same asset. It describes how the average works; it isn't a recommendation to buy.
Q: Does selling change my average buy price?
No. Selling reduces the number of units you hold, but the average buy price of the units you keep stays the same. What changes is your realised profit or loss: the result on the units you sold is calculated as the selling price minus the average buy price, multiplied by the units sold. Your remaining units keep being measured against the same average, so their unrealised profit or loss only moves with the market price.
Q: Why is my US stock average price in dollars when I paid in Rupiah?
Because US Stocks are bought and held in US dollars, so their average purchase price is calculated in USD. The exchange rate you converted at is a separate step, and its effect shows up in your portfolio as Foreign Exchange Difference when you view your holdings in Rupiah. Keeping the average in dollars means it reflects only the share prices you paid, which makes it directly comparable with the stock's current price.
Q: Where can I see my average buy price?
Open the asset in your Pluang portfolio. For US Stocks, the position section on the asset page shows your Average Purchase Price alongside the units you hold, your Portfolio Value and your unrealised profit or loss. If you hold the same stock with and without leverage, the section shows the two separately, each with its own average. You can reach your portfolio from the Portfolio icon on the Home page of the Pluang app.