You will be able to see the Order Cost on the Order Confirmation Window and Order Zone.

The ‘Order Cost’ is the total margin needed to open a particular position. It is calculated using the Initial Margin plus a 2-way taker fees. 2-way taker fees refer to the fee to open and fee to close. The actual fee charged/received depends on (order type) how the order will be executed (maker or taker order). 

Inverse Perpetual

Order Cost = Initial margin + 2-way taker fee (fee to open + fee to close)

Fee to open = (Quantity of contracts/Order Price*) x taker fee

Fee to close = (Quantity of contracts/Bankruptcy Price derived from Order Price*) x taker fee

USDT Perpetual

Order Cost = Initial Margin + Two-Way Taker Fee

Fee to open = (Quantity of contracts * Order Price) x Taker fee

Fee to close = (Quantity of contracts * Bankruptcy Price derived from Order Price) x Taker fee

Example:

A trader places a buy limit order of 10,000 BTCUSD contracts at 6,400 USD, using 25x leverage.

Initial Margin = (10,000/6,400) x 4%= 0.0625 BTC

Fee to open = (10,000/6,400) x 0.06%= 0.0009375 BTC

The Bankruptcy Price for this position= 6,400 x 25/(25+1)= 160,000/26≈ 6,154 USD

Fee to close = (10,000/6,154 USD) x 0.06%= 0.00097498 BTC

So, the Order Cost of this position:

= 0.0625 BTC (Initial margin) + 0.0009375 BTC (fee to open) + 0.00097498 BTC (fee to close)

= 0.06441248 BTC

Note:

The following criteria must be met in order to place an order successfully.

1) The Order cost ( Initial Margin + Two-Way Taker Fee ) required has to be smaller than or equal to the available balance

2) Under cross margin mode, in the event that there is opened position, (1.2 x maintenance margin (MM) of open position + unrealized loss of position) has to be smaller than or equal to the available balance