How to check the transaction fees, after opening a position, where to view the fees deducted for opening and closing positions?

$BTC The handling fee is ridiculously high. I was so excited about the new high that I couldn't help but short the entire position at 125X. Later, I realized that I wanted to cancel the order and open a tenth of the position. This one got me back 5U, and the principal was only 40U, brother