Open a position of $2000 at 2828, added to the position at 3087, held for over ten days, and tonight it went up. Directly opened $50000 at 3294, the liquidation price is around 3350. I admit it was a gamble, luckily it paid off. Why is the transaction fee so expensive? They deducted about 30 to 40 U from me, can old users still get a refund on the fees?