Addiction can come in any form and by any means, if we failed to properly positioned ourself to how we are trading, not only on trades can we have addiction, this also exist in every other thing we may be doing wrongly from the usual way it is expected to be done, we also have to consider that addiction in trading could come in many forms and also cost us, because we are not going to be addicted only, but also lose more trading fund at the cause.
To avoid addiction, the traders must have the right knowledge about the exit point. Those who can create a specific trading plan and have the mindset to prevent those who take retaliatory trades after a loss, in a word I believe that addiction will never work on them. Along with this, a fixed time limit should be set for trading and special attention should be paid to not giving too much time. And at every step you should ask yourself, why am I trading or does trading feel stressful to me or can I enjoy something else other than trading, etc., which will play an effective role in controlling emotions.
If I'm to rephrase the first statement I would say that, to avoid over trading, the traders must have the right knowledge about the exit point...Trading is something that must be done consistently to gain mastery of, but doing this regularly doesn't make a trader addicted but this doesn't mean that it's not possible to overtrade, this is what has potential harm..when you make Profit or hit your target it's important to close the trade doing more is considered as over trading but to some it's an addiction