https://www.elitetrader.com/et/threads/high-frequency-trading-firm-pays-64-7-million-in-record-spoofing-penalty.337633/
Forex and Stock Index are full of noise. Avoid them.
In my opinion, edges taking advantage of market inefficiency (either manual or automation trading) won't last long. They may work for months or years but eventually they'll be neutralized by market efficiency. If your edge relies on certain kind of indicators or patterns, it's likely you lose...
Rithmic is data/order execution provider such as CQG, not broker. Some brokers (IB, TDA, Tradestation,.. for example) use their own data, while others use 3d party data providers such as CQG, Rithmic, TT, ..... IMHO, Rithmic is the best.
If you have to use MT4 or MT5 seriously, you should use Windows. Wine based MT4 emulation has lots of limitations (there's no native Mac version of MT4 or 5). Try Windows virtual machine if you have powerful Mac.
Using Rithmic R Trader Pro, it's normal CME margin rate for Nat Gas (Sorry /NQ is not available to me as I subscribe Nymex only). I guess the margin number shown in your TV is not accurate. Maybe TV or CQG issue. TV is a mediocre platform you know....
S.Korea is one of the most corrupted countries in the world. That was one of the biggest fraud scam cases involved with current government's high level people. Avoid any Korea related fund or whatever.