There are many good and bad brokers available in the market and you can search for them and can find your desire broker with your own requirements. But always choose a broker with a good reputation and also broker should be regulated.
There are so many good ecn brokers, just look for the one that is backed with strong regulations. For me, fxview and icm are my fave when it comes to ecn brokers, they have a good trading condition for every style of trading, be it long term trading to scalping.
You should start with your research if you want to trade with a reliable broker. Try to look for a regulated broker because it comes with several benefits like protection from fraud, compensation in case of bankruptcy, segregation of funds, risk warnings, etc. I only trade with regulated ones because I like to have a fair trade. Ic markets, Swissquote and Fxview are some regulated brokers I trade with.