The answer is yes one can become addicted to trading just as gambling snd this is due to uncontrollable habits but for gambling I think one get stucked with it and find it hard to let go, but in trading it's highly addictive but you can as well limit it by controlling your activities so you be profitable amidst all.
If you think quitting trading addiction is easier than quitting gambling, and if trading addiction can be controlled, then why are we still addicted? So in my opinion, once we are addicted, it is not easy to give up, whether it is trading addiction or gambling addiction.
There are tons of signs but being able to observe and control them is cool.
Signs of addiction can vary and depend on the type of addiction, but most have common signs such as loss of control, neglect of responsibilities, spending a lot of time on it...And only outsiders can see that, addicts will never realize and admit that they are addicted.