Average cost (average purchase price) is the mean price of stocks bought over multiple purchases. Its calculated by dividing total investment by total shares owned.

1. Enter purchase date, quantity, and price. 2. Add multiple purchases using the Add button. 3. Check average price and total investment. 4. Enter current price to calculate profit/loss.

Dollar cost averaging can lower your average cost. Buying more when stocks fall reduces average cost but increases risk. Always invest wisely and consider your risk tolerance.