Please use the following guide to calculate your position's average entry price:

FORMULA

Average entry price = Total contract value in USDT or VNDC/total quantity of contracts

Total contract value in USDT or VNDC = [(Quantity1*Price1) + (Quantity2*Price2) + (Quantity3*Price3)....]

Example

Trader A bought 1 BTC contract at 9,000 USDT and another 2 BTC contract at 10,000 USDT

Average entry price = (1 * 9000 + 2 * 10000) / (1+2) = 9666.67 USDT