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.
I don't know how gambling and trading are linked together as you painted it, I just don't know. For me, they are not linked together, but have a certain thing in common, which is risk. I can assure you that good traders know what they are doing and manage their way to success, unlike gambling, which is highly luck-based. It's basically betting.
That aside. This is practical, those people whom I know who are gambling are still gambling, especially those who are core gamblers, despite losing far more than what they gained. But today, only a trader remains among the hundreds of traders I knew. This is the same everywhere. Hasn't that rung a bell that the addiction in gambling is not the same as that in trading?