What is the trading fee for CoinTiger?

Could you please clarify the trading fee structure for CoinTiger? I'm interested in knowing if there are any flat fees or if they are based on a percentage of the transaction amount. Also, do they offer any discounts or reduced fees for high-volume traders or those who hold a certain amount of their native token? Additionally, is there a withdrawal fee for transferring cryptocurrencies out of CoinTiger's platform? It would be great if you could provide an overview of their fee structure in a concise manner.