If you are using a Broker Standard Trading Account then no other commission with be charged except Spread. For RAW Spread Account, a $3.5/lot commission will be charged for a single entry.
It is because RAW spread accounts’ spread starts from “0” and according to the ers website, around 95% time it remains 0 in most of the r currency pairs. So, the er slightly add a commission on a per-lot basis.
Detailed information can be found on the broker official website – www.icmarkets.com