Please note that commission rate for cryptocurrency trading is 0.0025% per side, for a total of 0.005% of the nominal value of the instrument traded.
Example: 1.0 Lots BTCUSD at $17,000 — Contract Size is 10 per lot, so the Total value of trade is $170,000. Therefore the commission is $170,000 * 0.005% = $8.40.
Also note that commission for cryptocurrency trading is charged on all account types.