Forex brokers with dealing desk are market makers.
- Fixed Spreads or usually higher spreads
- Take the opposite side of your trade
- Artificial quotes
- Orders are filled by broker on a discretionary basis
No Dealing Desk (STP)
- Most have variable spreads
- Simply a bridge between client and liquidity provider
- Prices come from liquidity providers
- Automatic execution, no re-quotes
No Dealing Desk (STP+ECN)
- Variable spreads or commission fees
- A bridge between client and liquidity provider and other participants
- Prices come from liquidity providers and other ECN particpants
- Automatic, no re-quotes
Suitable type of brokers actually depend on the type of trader you are.
Even the CFD has no commission? What do you mean by dealing desk?