No broker (cough, bucketshop) would say that they employ Dealing Desk.... there's even a broker that say their have ECN platform but it's actually a regular mt4 platform with regular spreads and no commission. What a joke.
One of it is in the banner above... some others that i can think of are Etoro and may be Liteforex or Marketiva. Owh another one may be Tradeviewforex.