Addiction is defined like this: "Addiction is defined as not having control over doing, taking or using something to the point where it could be harmful to you." So it is possible to get influenced by emotion while trading or same could happen with greed. Chasing loss is emotional and overdoing trades while you are making only profits is from greed. When you mix these two, you can become addicted for sure. So I always try to stay away from those situations. I  make a target for profits and a limit to my loss. Then, if either of them is filled, I will exit the trading. Take a break, do something else. Then come back to it with a new target and a limit for my loss.
I guess it is very necessary to have a control over your emotions before getting into tradings. This will significantly increase your mindset and you won't fall into the category of "ADDICTED". And also if you could just follow the basic rules of trading, you are most likely never going to get addicted to trading. Having passion is a thing, but addiction is another thing. The more you do, the more experience you gather. But overdoing anything which is out of our control is always harmful.
So, trading addiction is a thing and with a little bit of work, we can maintain that and prevent it from becoming an addiction.