If yes what are the sign to know that one is becoming a trading addicts?
Yes, trading is addictive, but the only difference is that its addiction is not as rampant/tough as that of gambling and others.
The reason is that a bigger money is involved in trading, unlike gambling, where you can continue to gamble a little or a big amount, or a mix of the two, without control. The money in trading always teaches people that lesson and forces them to quit it more easily.
How do you know you are addicted to trading? Just as with other addictions, you will be unproductively and uncontrollably do it.
Why not when trading and gambling are often link to each other? It also/still depend on the person as some can only experience a slight addiction on either gambling or trading, while the other is the opposite of it. Trading is huge indeed but what about gambling? We won't see a surge of casinos if it isn't.
Trading is only more serious, so many can easily abandoned their interest here. In gambling, many people have learned their lesson too and in fact wishes that they should have joined trading instead. But yeah, it is not hard to spot an addiction. Some people are only blinded by the truth. Maybe some can say that being addicted to trading is much better than the other but I would say that any addiction is still bad even if we are earning.