How the trading fee is built
Every fill pays two parts, added together and shown as one number on the confirmation screen:
Both are calculated on the full position size, not your margin. A $100 margin at 10x is a $1,000 position, so fees apply to $1,000.
Exchange fee by market type
The exchange fee depends on two things: whether you are a taker (a market order, or any order that fills immediately) or a maker (a limit order that rests on the book before filling), and which kind of market you are trading.
Growth Mode is a reduced-fee setting the exchange applies to newer market categories, including the stock, index, and commodity markets Alpha lists. It cuts the exchange fee on those markets by at least 90%, so on a Growth Mode market almost the entire fee you pay is Alpha’s flat 0.05%.
Exchange rates above are the base tier. High-volume traders (over $5M in 14 days) receive lower exchange rates automatically. The exact fee for your order is always shown on the confirmation screen before you submit.
Worked examples
Closing pays the same again on the size you close.