You can check forexchief, been with them for while; Good conditions, regulated and licensed with over 8years of experience to show for it. You can check them if they suit your goals.
I would suggest open a demo account to test out forex brokers before you decide to commit to them. Also definitely test out their withdrawal/deposit with a small amount of money to see if there are any red flags.
Imo reliability comes from regulations. You need to also check other aspects but proper regulation is pretty much a green flag in my opinion. Currently I am trying out demo account of fxview and fxtm and they both have good conditions.
I trade with FP Markets, an ASIC regulated broker operating since 2005. They also have regulations from CYSEC and an offshore licence with St. Vincent.
according to me the reliable broker is a broker who can make sure security of funds with a wide range of trading technologies.
What I would suggest is to check for the regulation of the broker, which is the first thing and followed by the idea of their trading conditions, which you can try out in demo. That is how I landed on aaafx and then live right after.
By choosing a regulated broker, you, first of all, protect yourself from fraud and increase your chances of fair trading and safe storage of your funds. I have been trading for several years with the FCA-licensed broker fxopen, and have not seen any problems with order execution, spreads, or withdrawal speed.