@Michael: A good regulatory body is one that is internationally credible, such as CFTC, NFA, FCA, FSA, FINMA, MiFID, ASIC and FMA. These regulatory bodies have been tested and are world-recognized, and they impose strict sanctions on forex brokers if they are found to violate agreed-upon terms. These regulatory bodies are also responsible for the security of client funds.
Regarding truly ECN brokers, you can look at Dukascopy, Saxo bank, City Index. A true ECN account is characterized by a large minimum deposit and small leverage. In addition to ECN, there is also the STP type as an alternative to get an NDD account type with a smaller minimum deposit and larger leverage.
@Sugiarto: Good afternoon, Mr. Sugiarto. Of the two options above, I think FXOpen is better due to better regulations. Alpari (Alpari International) is a business name owned by Exinity Limited which is regulated by the Financial Services Commission of the Republic of Mauritius with Investment Dealer License No. C113012295. Meanwhile, the regulation of Fxopen is one level better because this broker has regulations from the FCA and ASIC regulators. FXOpen UK is regulated by the FCA UK (No. 579202), FXOpen AU Pty Ltd is regulated by ASIC Australia (AFSL 412871-ABN 61 143 678 719) and FXOpen Markets Limited is registered in Nevis (No. C 42235).
Thank You